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AUDI Q8 - Engine Loses Power intermittently - Limp Mode - WHY?? Code P0299 - Diagnosis! — Transcript

by KIT'S Auto and Truck Repair · 6,502 words · 1,171 segments · language en · Watch on YouTube

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0:00What? Boost we built.
0:03What? Drive system malfunction.
0:07There's a light that came on.
0:09Use
0:11it however the camera is. Yeah, see how
0:13See that? There's oil in there.
0:14>> Hello viewers. Welcome to Kids Auto and
0:17Truck Repair. Today we have a 2021
0:20Audi Q8 with a 3.0 L engine. The
0:25customer complaint on this vehicle is
0:27the check engine light is remaining on
0:29on the dash while the engine is running
0:31and the vehicle is losing power. She
0:34told me especially when she's going up a
0:36hill, the vehicle is losing power
0:39tremendously. So, the first thing we're
0:41going to do is we're going to go in the
0:43vehicle and confirm the customer's
0:45complaint. We might have to take it on a
0:47test drive and see how it drives. And
0:49after that, we're going to scan the
0:52engine computer to see what codes we
0:53have and then we'll go from there.
0:55Behind the camera, we have cameraman
0:57Kyler. So now, let's go in the vehicle
1:00so we can confirm the customer's
1:02complaint. So, I'm going to start the
1:04engine first.
1:07So, as you can hear,
1:09the engine is running.
1:13We have a message on the dash that says
1:15reduce engine oil
1:18and then the check engine light is on.
1:21This vehicle has 90,000 mi
1:25315. That's not a lot.
1:28Okay. So, the check engine light is on
1:29on the dash. I'm going to show you the
1:31dash so you can see the check engine
1:33light. So, right there, as you can see,
1:36the check engine light is on on the
1:37dash. So, that's customer's complaint
1:40confirmed. I'm going to turn off the
1:42engine.
1:43Let me start it again. I'm going to show
1:44you the message
1:46that was on when I first started it.
1:48Right there. Reduce
1:50oil level. So, it looks like this engine
1:53has
1:54too much oil in it.
1:56Okay. So, I'm going to turn off the
1:58engine.
1:59So, there's too much oil in the engine.
2:01We're going to have to check that for
2:03her.
2:04Please reduce oil level. The scan tool
2:07dongle is connected.
2:09Now, let's scan the engine computer and
2:11see what codes we have.
2:15This is an Audi.
2:18It's a 2021.
2:20So, right there, vehicle has been
2:22identified.
2:232021 Audi Q8 with a 3.0 L engine.
2:28Let's click okay.
2:30Let's do a code scan on this.
2:34Let's see what codes we have.
2:35Oh, right there.
2:38P0299
2:41We are very familiar with this code,
2:42guys.
2:44It says turbo supercharger under boost
2:47or low boost, basically.
2:49There's a low boost code, Kyler.
2:51>> Mhm.
2:53>> What do you think is causing that?
2:54>> I don't know.
2:55>> You don't know?
2:57We fixed a similar issue
3:00a couple months ago.
3:03>> It could be a couple things.
3:05>> Could be a couple things, right?
3:07Now,
3:08uh I'm sure on the generic side of the
3:10scan tool, it's going to say low boost
3:12or supercharger
3:15um
3:16low boost. Now, this code, this P0299
3:20code, can be caused by a defective turbo
3:24or a leak in the induction system, so
3:27between the turbo and the intake
3:29manifold.
3:31Um a turbo actuator
3:34uh wiring that's defective or a turbo
3:37actuator that's bad.
3:39So, it could be a couple things.
3:41Even a boost a a defective uh
3:45boost pressure sensor can cause this
3:47also.
3:48But, the chances of having a defective
3:53boost uh sensor is very low.
3:56So, what's really common on these is
3:58turbos. The turbos on these fail very,
4:02very uh easily.
4:05Okay, so they're notorious of failing.
4:09Actually, I was talking to a friend of
4:10mine at the
4:11Audi dealership. He told me that they
4:13stock a lot of them because they go
4:16through them a lot. So, even the
4:18dealership, even the Audi people
4:19themselves, they know that these
4:22turbos don't last. Okay, so let's scroll
4:24down and see what else we have.
4:27We have one code in the central
4:29electronics.
4:31We have five codes in the diagnostic
4:35data interface gateway.
4:38I'm going to notify the customer about
4:40all these other codes.
4:42But in this video, we're going to focus
4:45on the low boost code that we have. So,
4:48on the generic side of the tool, we have
4:50P0299,
4:52turbocharger {slash} supercharger
4:55A under boost condition. So,
4:58low boost.
4:59So now, first thing I'm going to do is I
5:01want to go into the engine computer.
5:04Let's look at some data.
5:07Let's look at some data pids.
5:09I want to see my boost pressure data
5:12pid. So, right here. Actually,
5:15this is kind of
5:17a side note here.
5:19Engine oil level. Let's see what's the
5:20data there. Oh, current or current value
5:24oil level is at 158.2%.
5:29Yep. Whoever did the oil change last put
5:31too much oil in this.
5:33We're going to have to lower
5:35the oil level.
5:37Actually, the customer told me
5:40She told me the name of the shop, but
5:42I'm not going to say the name, okay?
5:43We're We're not here to like bash other
5:45people, okay?
5:47We're are here to work with other shops,
5:49not make not throw them under the bus,
5:51but the customer told me
5:54Actually, the customer lives nearby. She
5:55doesn't live far from here.
5:57She told me she bought the car, you
6:00know, about a year or two ago.
6:02She was taking it to the dealer all the
6:04time and
6:05one day she decided to use another shop
6:07nearby. She took it there for an oil
6:09change. They changed the oil and then
6:11after she picked it up, there was a
6:12light on the dash that it was saying oil
6:14level too much.
6:16Or release or reduce oil level. She took
6:19it there for the second time. They
6:20changed the lowered the oil level.
6:23The light was still on. And then she got
6:25so frustrated she never went back. And
6:27actually she asked me, she said, "Deal,
6:29you know, I was searching for shops
6:32online and then I came across your shop.
6:34I watched the videos. I like how you
6:36guys do things
6:37and I felt comfortable bringing my car
6:39over here based on the videos that I
6:41saw." And then she also told me, "Can
6:43you look at the message I have on the
6:44dash?" It says
6:46uh reduce oil level. I was like, "It
6:48looks like there was there's too much
6:50oil in it." He said, "Yeah." She said,
6:51"Yes. I mean
6:53I took it to a shop. They reduced it for
6:55me, but the light keeps coming back on."
6:56So,
6:58there's a possibility that there's too
7:00much oil in it or maybe the oil level
7:02sensor is failing. That's possible, but
7:05we're going to have to check it out. So,
7:07let's back out here. What I would
7:08recommend is I'm probably going to
7:10recommend an oil change. We're going to
7:11drain the oil out of the engine and then
7:14we're going to fill it back up to the
7:15correct level.
7:18Because when you I mean this is the
7:20other thing that
7:21I mean, some of you might know, but some
7:23of you may not know.
7:25When you
7:26fill up the engine, when you fill the
7:28oil level on these
7:30uh engines, sometimes you have to
7:33lower it a little bit because when you
7:35drive the engine, the oil gets hot and
7:37then it expands.
7:39So, if it tells you the engine takes 5
7:41qt,
7:42Sometimes you have to put 4 and 1/2.
7:45Because when she's going to drive, the
7:46oil is going to expand, and then the
7:48level is going to rise. So, if if book
7:50time says 5.2,
7:53just put 5.
7:54Because if you put 5.2 or 5 and 1/2, and
7:57then she drives it, the oil rises, then
8:00the level goes up, and then the light
8:01comes on.
8:02And then the customer looks at you like,
8:04"Do you know what you're doing?" So,
8:05yeah. Just a side note to those of you
8:08who don't know that. Make sure that
8:10>> What What's the harm in putting too much
8:12oil?
8:13>> That's a good question. If you have If
8:14you put too much oil in the engine,
8:17it can foul uh spark plugs because you
8:20you will have oil that's going to pass
8:22the uh piston rings, and then the oil
8:25will go on top of the um
8:27pistons, and then foul the spark plugs.
8:30It can also
8:32um damage seals around the engine
8:34because you're going to have too much
8:36oil in the engine, and when the um
8:38the crankshaft is going to spin, it's
8:40actually going to
8:42uh push oil towards the seals, so that
8:45can blow up some seals. Uh so, it's
8:47going to lower the lifespan of seals
8:50like rear main seal, front seal, and all
8:54kinds of seals.
8:55And then, you can also see white smoke.
8:58White smoke coming out of the um
9:01tailpipe because you have oil go past
9:04the rings, it's going to go in the
9:05combustion chamber, and some of that oil
9:08may not burn. It's going to get pushed
9:10into the exhaust system. If that oil
9:12gets pushed into the exhaust system,
9:13guess what? It's going to end up in the
9:15catalytic converter. You're not supposed
9:17to have oil in a catalytic converter.
9:19So, if you have oil in a catalytic
9:20converter, that's going to cause the
9:22catalytic converter to overheat, and
9:24then you're going to damage your
9:25catalytic converter. So, it's going to
9:27cause all kinds of issues. So, don't put
9:29too much oil in it because
9:31you know, this is why
9:34I mean, I not I'm not going to name the
9:36company, but some of you know there are
9:39companies out there that do cheap oil
9:41changes for like
9:43$15.99 or whatever, $5.99. I don't know
9:46whatever it is, but the quick oil change
9:49places. They don't charge you as much
9:52for an oil change, but the thing is some
9:55of them don't have the correct service
9:56information that we use. They don't use
9:59the quality oil that we use cuz we use
10:02OEM stuff, like the quality stuff that
10:05we install we get from the dealer for
10:07the most part, right?
10:09And we follow service info. We follow
10:11book time to do things properly, but
10:14those places sometimes they don't. They
10:16put too much oil, sometimes too little
10:18oil. So, a cheap oil change can cause
10:22issues. I mean, how many times have we
10:23changed engines over here because the
10:26car came from that company that was
10:28changing the oil for the last 2 months
10:31and now the customer needs an engine. I
10:34won't say the name. Maybe say the name
10:36in the comment section.
10:38You know, so and I tell my customers our
10:41oil changes are not cheap like I mean,
10:44we're not going to charge you $55 for an
10:46oil change. We're way over that, but the
10:48thing is we're going to do it right and
10:51if we maintain your vehicle, it's going
10:54to last long. So, you might spend a
10:56little bit up front, but in the long run
10:58it's going to save you money.
11:01All right, so cameraman Mike is back.
11:05The food is here.
11:06>> Pizza.
11:06>> Pizza is here.
11:08So, it's pizza day today. All right,
11:10Kyle. So, let me just look at the Let me
11:11just look at the data
11:14and then
11:15and then we can stop and get some lunch,
11:17take a lunch break, and then we'll be
11:18back. So, let me just go to charge
11:21pressure control.
11:23>> Didn't we have to change an oil pan or
11:24something that came from one of those
11:25places?
11:26>> Mhm.
11:27>> They like over
11:27>> They over too Yeah. Yeah, they actually
11:30uh they stripped they stripped the oil
11:33um
11:33the drain plug.
11:35>> They stripped the drain plug and we have
11:36we ended up changing the oil pan, yeah.
11:39Yeah, so I I tell our customers
11:42we are here to take care of you.
11:45We are here to fix your vehicles right,
11:47but doing things the right way
11:49I mean nowadays costs, you know,
11:51everything is more expensive now, so
11:54I I mean, if I wasn't working on cars, I
11:58would definitely bring my car to this
12:00shop.
12:01Knowing how we do things over here, I
12:03would definitely bring my car here. So
12:06guys, make sure
12:09you take your car to a good shop that's
12:11going to take care of it, okay?
12:13Cameraman Kai is laughing behind behind
12:15the camera. All right, let me start it.
12:17Let's see.
12:19So engine is running.
12:21Right now our charge pressure actual
12:23value is 14. 86.
12:2786. So I'm going to rev up the engine.
12:32So the maximum pressure we're building
12:34right now
12:35it kind of went up to about 17. 40
12:38and that's it.
12:41Now
12:42I don't know if you guys can hear this,
12:44but the engine is not really revving up
12:47with power. Listen to this, Kai. I'm
12:49going to rev it. I'm going to step all
12:51the way
12:52I'm going to step on the accelerator
12:53pedal all the way to the floor.
12:56You hear that? There's like the
12:59It's like a It It feels like there's a
13:01rev limiter. So we're not building
13:03enough boost. It's supposed to go like
13:06You know what I mean? Like It's supposed
13:08I mean, you know what I mean? Like the
13:09the RPM.
13:11Maybe I should have Gavin rev it for us.
13:16Yeah.
13:17All right, cool. We're going to stop
13:19here. Let's go get some lunch first. And
13:22then when we get back after our lunch,
13:23we're going to pick it back up.
13:25I want to rev it a couple of times. I
13:26might have to have Ravi, I mean Gavin,
13:28rev it for us.
13:30So, we can watch this. And then we're
13:31going to go under the hood before I take
13:34it on a test drive. We can smoke test
13:36the induction system to see if we have a
13:38boost leak. I don't hear a boost leak
13:40under the hood though. Cuz usually when
13:42you have a boost leak, you will hear a
13:43hissing sound coming from under the
13:45hood. Cuz when I rev it,
13:48I don't hear a hissing sound.
13:50So, I don't think we have a boost leak.
13:55Okay. So,
13:57let's take a quick break. We'll be right
13:59back. We're back from our lunch break.
14:03We ate some pizza. Kyler, did you enjoy
14:06your your lunch?
14:07>> I thought it was good. Thank you.
14:08>> It was good. You're welcome.
14:10We had pizza here today, guys. Pizza
14:12day.
14:13Anyways, so here the here is the code
14:15that we have. We were looking at the
14:17data before we went to lunch.
14:21So, we were looking at our boost
14:23pressure data PID.
14:27So, I graphed
14:29these PIDs over here.
14:32Let me start the engine one more time.
14:36Okay. So, I'm going to rev it.
14:42So, as you can hear,
14:44it sounds like the engine is not
14:46building enough boost pressure.
14:53So, what I want to do is before we go
14:55under the hood, let's take this for a
14:57spin. Let's drive it around
15:00and see
15:01uh what kind of boost we're going to
15:03build while we're driving. And then when
15:05we get back, we're going to do some
15:07tests under the hood. So, Kyler,
15:10jump in and let's go on a test drive.
15:12Let's drive out of here.
15:17Got to get the seatbelt on.
15:20Safety first.
15:24So, check engine light is still on.
15:27We did not clear the codes.
15:31All right. So, so far
15:35we're building about 14.6
15:38PSI.
15:40When I rev it up a little bit, we went
15:42up to about 15 PSI.
15:49She said it most it it loses power
15:52mostly when you going when you going up
15:54a hill.
15:56We don't really have a hill over here.
15:58We can go try this out.
16:00Maybe this hill coming up here.
16:03So, we're going down this way and
16:05come back.
16:10And pick up some speed over here.
16:22Did I mention that it's common for these
16:24turbos to fail
16:25on these Audis?
16:27Uh it's a very common thing over here.
16:30>> Oh, it feels good so far.
16:31>> It does, yeah.
16:34But, we we're just driving on flat on a
16:36flat surface.
16:39You think this is a hill?
16:45It it feels fine.
16:53I wish I could really go fast, but
16:56with these turns here
16:59we got to be careful.
17:17I mean, it's building
17:20It's building boost.
17:25But not
17:28not enough.
17:30It's building a good amount, but not
17:37not a ton.
17:40I'm just going to floor it here. Let's
17:42see.
17:47So, maximum boost we built
17:51What? Drive system malfunction.
17:55There's a light that came on.
17:57Drive system malfunction.
17:58>> Yeah, I got it.
18:00>> Why?
18:01>> Huh.
18:02>> Is it because of the light with the
18:04check engine light?
18:08>> I don't know. The power feels good.
18:13>> So, for example, right now I'm flooring
18:15it.
18:16No, it's going down right now.
18:20I mean, it's not It should be going up
18:22to like 25 or even 30 PSI.
18:26So,
18:27it's building power, but not enough.
18:30Yeah, not enough. It should be building
18:32more boost.
18:35Yeah, it's It should be building more
18:37boost pressure. Actually, we can just
18:39turn around here.
18:41Man, it's getting green over here.
18:43>> No, it's
18:43>> Beautiful. It's starting to look nice.
18:45Look.
18:46Oh my gosh.
18:48>> good.
18:48>> I know.
18:49Okay, actually, you know what I'm going
18:50to do?
18:51Okay, let me turn it off. Turn the key
18:53on.
18:54Turn it off. Turn the key on.
18:56Let me look at the data page from the
18:59generic side. Go to OBD direct.
19:02Let's see what the boost pressure
19:04reading is going to be from the generic
19:07side of the tool.
19:09Because sometimes on the Sometimes on
19:11the OEM side
19:13we might be dealing with substituted
19:16values.
19:18And that can throw us off sometimes. So,
19:21OBD generic can be the way to go
19:24sometimes. Actually, let me back out.
19:26Let me see if we have freeze frame
19:29available here.
19:31Freeze frame.
19:34Let me see when this trouble code was
19:36set.
19:37So, this trouble code was set at 18 and
19:4137
19:42RPMs.
19:44Engine temperature was Engine
19:47temperature was 200 and
19:5013°
19:52short-term
19:54I mean long-term was minus 1.4.
19:57And then short-term was 2.3. Where is
19:59boost pressure? Do we have boost
20:01pressure data pit here? So, calculated
20:03load value was 64.3%
20:08commanded thorough angle control was
20:1165.9%.
20:14And then
20:17this happened in closed loop, so no
20:20boost pressure.
20:21Hm.
20:22Okay.
20:23That is good to know.
20:25It's interesting how we don't have a
20:26boost pressure
20:29data pit on the generic side.
20:32Let's see.
20:36Oh, right here. Boost pressure A.
20:39But we did have the speed over here on
20:41the
20:43freeze frame.
20:45That's interesting. So, let's customize
20:47this list.
20:49Let's grab
20:53our
20:59the our data pits that we need to look
21:01at.
21:12>> Okay, so here are the only pids I want
21:14to look at. I'm going to graph my boost
21:17pressure data pid.
21:19So, let's start the engine.
21:22Okay, let's turn around here.
21:43I mean, this is a Q8.
21:45Actually, when I'm thinking about the Q5
21:47that we worked on a couple months ago,
21:49>> Mhm.
21:49>> it had 90,000 mi, too.
21:51>> Oh.
21:52>> This one has 90,000 mi.
21:54>> Oh.
21:54>> So, I'm starting to notice a pattern
21:56here.
21:57>> Yeah.
21:57>> Maybe
21:58when you get to about 90,000 mi on these
22:02Audis, that's when you needed the turbo.
22:11Okay, so maximum boost that we built is
22:1618.9
22:17psi.
22:23And also, you know, a failing turbo will
22:26do that, too.
22:27Sometimes it would work fine, sometimes
22:29it would stop working. So, it would be
22:31failing intermittently. Dang, my butt is
22:34on fire right now. This This seat gets
22:36really hot.
22:38Jeez.
22:39>> I got the warmer on.
22:40>> Uh
22:46Uh-oh.
22:48Slow down.
22:56I believe this message is coming on on
22:58the dash because we have a
23:00code in the engine computer,
23:02the P0299 code.
23:07Okay, I'm going to try to go really fast
23:10going up the hill
23:11to see how much boost we're going to
23:13build
23:14when we're climbing up the hill.
23:20So, I'm going to let all these cars in
23:21front of us get away.
23:24Then
23:27we're going to give it the beans. It's
23:29interesting how thing everything is
23:31starting to turn green right now.
23:33But a couple weeks ago it was all dead
23:36and dry and
23:38but now
23:39>> All that rain we've been getting.
23:40>> I know. So, we're going up the hill. I'm
23:43going to I'm going to give it the beans.
23:46Let's go up. Let's see.
23:49Going up.
23:52So, maximum boost we built
23:56is about 18 PSI.
24:00Now, as we were going up the hill, I
24:02don't know if you noticed, Skyler, we
24:04didn't shift.
24:05You know what I mean? And we didn't
24:07shift because we were because that that
24:09hill wasn't long enough. If it was a
24:11longer hill, we were going to notice
24:13that low power that that like power
24:15decrease.
24:16So, yeah.
24:18Going up the hill, we're not building
24:19enough
24:21boost pressure. We're building enough. I
24:23mean, we're building about we we built
24:25about 18 PSI when we were going up the
24:28hill, which tells me that the turbo was
24:30trying to build that boost pressure. If
24:33we don't have a leak cuz right now what
24:35I want to do is let's get in the shop
24:37and
24:38smoke test it.
24:40If there are no leaks around the turbo,
24:43we're going to check the actuator of the
24:45turbo. If the wiring of the actuator is
24:47fine,
24:48we're going to recommend changing a
24:50turbo.
24:51Yeah.
24:52Based on the data that we have and based
24:55on experience because I mean, I don't
24:57think the uh
24:58turbo actuator wiring has an issue.
25:00Because if we had a wiring issue, we
25:03would have a code for it. But, we're
25:05still going to check it before we
25:06condemn
25:08the turbo. So,
25:09now I'm going to turn off the engine.
25:12Let's go under the hood and do a visual
25:14inspection. And then we're going to
25:15smoke test the induction system. Let's
25:18open the hood.
25:25German engineering.
25:28We love Audis.
25:31Do you like Audis, Kyler?
25:34You do?
25:35Yeah, they're good cars, right? Yeah.
25:37They ride very nice.
25:41Yeah, I like them, too.
25:43I do like them.
25:45So,
25:46the Audi expert, Robin,
25:49told me that there are some clips over
25:51here on the side
25:53that you have to
25:58undo
26:08so we can remove this cover.
26:17What in the heck?
26:20Okay.
26:22This side over here is off.
26:25But, this side is not.
26:28There we go.
26:39There you go, Audi.
26:41Okay, so first things first, we're going
26:43to do a visual inspection.
26:48Everything over here looks good.
26:51I'm checking these this tube over here,
26:53this
26:54this charger cooler tube.
26:57Cuz these ones usually leak.
27:08You know what?
27:10I should get this on the lift.
27:13You know what I mean?
27:13>> Maybe.
27:14>> That way we can also inspect the bottom.
27:17Cuz these charger could these tubes go
27:19to the charger cooler.
27:22I mean, we can just smoke test it here,
27:23but what if we have a leak somewhere
27:26over there?
27:27Okay, let me get this on the lift and
27:29then I'll bring you guys back up. All
27:30right, I got the vehicle on the lift.
27:33Let's redo this.
27:36Now, I'm going to install some fender
27:38covers here.
27:39We do not want to scratch the paint.
27:44So, this is going to cover
27:48the paint.
27:52And then this is going to go right here.
27:57We don't want the customer's paint to
27:59get scratched. Perfect. You like that,
28:02Tyler?
28:02>> Yeah.
28:03>> Nice.
28:04So, now
28:06we are going to install
28:09the light.
28:15Nice. All right.
28:16So,
28:18we do the visual inspection here.
28:23I'm going to remove this guy.
28:30Now, this thing just pops off.
28:34I'm just going to pop it out.
28:37It's going to
28:38gently
28:41pry it out.
28:44There There go.
28:48And then
28:49we're going to undo this clamp over
28:51here.
29:09There.
29:11So, here comes the engine air filter
29:13housing.
29:16Let's get these out of the way.
29:19Tada!
29:21Check this out.
29:23Here is our turbo charger.
29:26Looks clean, though.
29:31And
29:34this over here
29:36looks like this over here is the
29:38solenoid for it.
29:40It's a turbo solenoid. That's the
29:41solenoid for the actuator.
29:46And then
29:51Oh, I see oil over there.
29:54Do you see it? I don't know if I don't
29:56know how well the camera is. Yeah, see
29:57how See that? There's oil in there.
30:00That's not good.
30:01We shouldn't be having a lot of oil in
30:03there.
30:05That's no bueno, Kyler.
30:08Yeah.
30:10I mean, it's not smoking, though. I
30:12couldn't really
30:13tell, but
30:15a little bit of oil on this
30:17PCV tube is fine.
30:21But, a lot is definitely a problem.
30:24Looks pretty good.
30:25Now,
30:27let me grab my
30:28vacuum machine. We're going to connect
30:30it, and then we'll do
30:32we'll vacuum this induction system here.
30:34So, I got my smoke machine here.
30:38I'm going to power it up.
30:40And then we're going to smoke
30:43this induction system here.
30:48Let's see what
30:52what we have here. So, power,
30:55ground.
30:58Smoke ma- Smoke machine is powered up.
31:10It's right here.
31:14Let's increase this up to 15 psi.
31:1815 psi.
31:21I'm going to put this adapter over here.
31:32So, we should have smoke coming out of
31:34this.
31:44>> It's like coming out the back
31:46of the smoke machine.
31:48>> Oh.
31:49There's a leak here.
31:51Let me see if we have smoke going into
31:53the engine. I'm going to undo the oil
31:55fill tube. Oh, there.
31:58Yeah. See that? Okay, so we got smoke We
32:01have smoke coming out of this because
32:03it's going through the PCV system. So, I
32:05don't see a leak up here.
32:12So, we have smoke going through the
32:14induction system.
32:16And there's a little bit over here. Let
32:17me just push this.
32:19Let me push this guy all the way in.
32:28My adapter is a little small.
32:37Now, let me open up this cap again.
32:40Oh, yeah. See that?
32:41>> Oh, yeah.
32:42>> The fact that it's coming out with a lot
32:44of pressure, this tells me that Yeah,
32:46see? We don't have a leak.
32:49We do not have a leak.
32:51Let me look underneath.
32:53Nothing over here.
32:55Okay.
32:58Let me back out.
33:01Yeah.
33:02Cuz I don't want to keep this on while
33:05we raised it up.
33:08Uh maybe I should.
33:11Let me do it at about
33:135 PSI.
33:15So, about 4 PSI. Okay.
33:17So, now I set my smoke machine to 4 PSI.
33:21Now, let's let's raise up the vehicle.
33:25Let's see what we got.
33:28Now, this shouldn't need much because it
33:30only has
33:3190,000 mi, so
33:34But, you never know. Don't assume.
33:36Always test.
33:38All right. So, we got the vehicle up in
33:40the air.
33:41Now,
33:42I'm looking around the charger cooler
33:45here.
33:46Carler, if you can show this component.
33:48>> Oh, yeah.
33:48>> Now, these Audis have two charger
33:50coolers. There is one on each side of
33:52the vehicle.
33:54They usually put one
33:55uh charger cooler below the uh
33:58headlight. Now, you see how dry it is
34:00over here?
34:01>> Yeah.
34:01>> And you know how we know that a charger
34:04cooler is leaking?
34:05If there's oil around it. Remember?
34:07>> Oh, yeah.
34:08>> You know? From the Sprinters. There you
34:10go. Carler is becoming an a expert here.
34:14A diesel
34:16uh diagnostician here. Yeah, so the fact
34:18that everything around these tubes is
34:20dry, this tells me that this charger
34:23cooler is not leaking. So, now let's
34:25check the one on this side.
34:27So, same thing.
34:29Can you see up there, Carler?
34:30>> Yep.
34:31>> You see how dry it is?
34:32>> Mhm.
34:33>> No oil.
34:35You know,
34:36no oil residue here. So,
34:39this tells me that we do not have a
34:42leak. And also, if we had a leak down
34:44here, we would see smoke coming out of
34:46these charger coolers.
34:48So,
34:50now, I'm just going to look around and
34:52see if there's anything else
34:54that needs attention.
34:58Uh look at this over here, Kyler.
35:00So, this this tensioner
35:02>> Mhm.
35:03>> You see how rusty it is? You see the
35:05rust behind the tensioner there?
35:07>> Oh, yeah.
35:08>> Yeah, that's not good.
35:09This this tensioner needs to be changed
35:12because it's going to start squeaking
35:13eventually
35:14and uh
35:17that can break. So, I would recommend
35:19changing that tensioner, too.
35:21That rust is coming from the spring
35:23inside the tensioner.
35:26The belt looks very fine.
35:29No leaks around the front of the engine.
35:38Good.
35:40Nothing here. It's really dry back here,
35:42so that's good.
35:47Guys, I've said this in our previous
35:49videos. I'm going to say this again.
35:51When we bring a vehicle in the shop, we
35:53always inspect it.
35:56Okay, so we're going to inspect this
35:58vehicle. We're going to take pictures
36:00and send the inspection report to the
36:02customer.
36:04But as I'm looking over here, I'm just
36:05doing a quick visual inspection here.
36:08I don't see anything that's really
36:10catching my eye.
36:12You know, nothing too crazy. She might
36:14need
36:16rear brakes soon
36:18cuz the the caliper piston over here is
36:20pushed out a lot.
36:22Let me see over here.
36:27Yeah, she will need brakes.
36:30Oh, yeah.
36:31Can you show over here? I don't know how
36:33well you can see this.
36:34See my finger in there?
36:36>> Mhm.
36:37>> Yeah. You You see how how pushed out the
36:40>> Yeah.
36:40>> caliper piston is?
36:42>> Yeah.
36:43>> When you see a piston being pushed out
36:45all the way like that, that means the
36:47pad are worn out.
36:50So,
36:51yeah.
36:52We're going to put all of that in the
36:54inspection report. Let me check the
36:56front. Actually, the front pads
36:58look pretty okay. It's the back ones
37:01she's going to need need
37:03rear pads.
37:05Okay.
37:07So, based on what I see here,
37:11you know,
37:12this is leading me towards a bad turbo
37:15because we don't have a leak.
37:18Now, the last thing we need to do is we
37:20need to use a scan tool and check the
37:22actuator of the turbo with the scan tool
37:24to make sure it's working.
37:26And then, we're done.
37:28So, let me let me lower the vehicle.
37:34So, our charger coolers are not leaking,
37:37so that's good.
37:40Okay.
37:43So,
37:45what else do we need to check? So, this
37:47actuator over here,
37:50if you can show this actuator,
37:53this waste gate actuator, it's a vacuum
37:55operated.
37:57It looks like we're going to have to do
37:58this while the engine is running.
38:00Okay, let me get my smoke machine out of
38:03the way.
38:04We are done with this.
38:13So, now I need I need to reconnect the
38:16air filter box.
38:18Hold on. Let me see. I should be able to
38:20Wait.
38:24Here's the whole thing.
38:26Mhm.
38:28Do I need to remove this? You know what?
38:30I'm going to start it without the
38:31filter.
38:32Just for a few
38:34minutes.
38:36Just for a few minutes, Kyler.
38:38Okay, let me grab the scan tool. We got
38:40Robin in the car. The key is on.
38:45Let me see what kind of a functional
38:47test we have here.
38:49Turbo bypass valve off.
38:52Turbo charger recirculating valve. Yeah.
38:55Start it.
39:00Okay.
39:07Rev it just slightly.
39:11You see how the gear Do you see how the
39:13wastegate is moving?
39:15Rev it.
39:18Okay, let go.
39:20Did you see how the actuator was moving?
39:24Okay. Now, focus on the actuator, Kyler.
39:28Rev it again just slightly. Okay.
39:30Start it again.
39:34Okay.
39:35Rev it.
39:41Okay, hold on.
39:43Let me uh
39:45Let me do all these turbo
39:47tests that I have here.
39:52Over here.
39:57I mean, the fact that the actuator lever
39:59turned I mean, moved earlier,
40:02that tells me that the solenoid that
40:05controls the uh
40:06turbo actuator
40:08is being controlled by the engine
40:10computer.
40:23>> Okay, rev it.
40:24Just snap.
40:33There.
40:35Snap it again.
40:37There. Snap it.
40:40All right, that's good.
40:42Turn your off. Okay, so this actuator
40:45here is vacuum controlled, okay? The
40:49engine computer controls this solenoid
40:51over here.
40:52Okay, which allows vacuum to go from one
40:55side of the solenoid to the other to
40:57actually control this actuator.
41:00Okay, so the wastegate actuator is being
41:02controlled.
41:04So which tells me that the engine
41:05computer is trying to
41:07create boost that we need.
41:10So turbo.
41:12So
41:13Audi expert
41:16These turbos has got to go.
41:18>> Awful.
41:21100,000 100,000 miles.
41:22>> Yeah.
41:23>> Regular.
41:23>> Yeah.
41:24Yeah.
41:25>> 2.2 always do the same thing.
41:26>> 2.2, yeah. Actually the the one we did
41:28last time failed at 90,000 miles.
41:32>> Yeah.
41:32>> And this one has 90,000 miles, too.
41:34>> Yeah.
41:34>> Yeah.
41:35>> Regular.
41:35>> Yeah. So they fail around 100,000 miles,
41:38basically.
41:38>> Yep. Yeah.
41:40>> So we checked there we checked the
41:41induction system. There are no leaks.
41:43Oh, yeah. So now I'm going to call the
41:45Audi dealership. I'm going to ask them
41:48to give me a list of all the components
41:50that I need to do this turbo, including
41:52the the turbo itself.
41:55OEM parts only.
41:56>> Yeah.
41:57>> Especially for these kind of vehicles,
41:59OEM only. We're going to get a OEM
42:01turbo, all the gaskets, bolts. For
42:03example, these bolts that I see over
42:05here, I'm sure we're going to have to
42:07change these.
42:08>> Oh, yeah.
42:08>> See that?
42:09>> Yep.
42:09>> Cuz this is the
42:12exhaust
42:13>> manifold
42:14>> manifold with it.
42:15>> Yeah.
42:16>> Cuz as I'm looking, I believe all of
42:17this will be the turbo.
42:18>> Yeah.
42:19>> Yeah. So, yeah. So, the the uh exhaust
42:21manifold is part of it.
42:23>> Yeah.
42:23>> So, exhaust manifold gaskets, turbo
42:26gaskets, seals, bolts, everything.
42:29>> Everything.
42:30>> Yeah. Clamps. Probably this clamp, too.
42:32>> Yeah.
42:33>> You know? And uh yeah. All the good
42:35stuff. Now, this over here, I believe
42:37this is the oxygen sensor.
42:38>> Yes.
42:40>> Yeah. And sometimes these guys can get
42:41stuck. So, if this is stuck,
42:44we I'm going to have to put it in the
42:46estimate, and I'm going to tell the
42:47customer this is optional. If it comes
42:49out easily, we don't have to change it.
42:51If it's stuck to the point where we have
42:53to destroy it to remove it, then we got
42:55to change it. So, yeah.
42:57>> Are you saying the air mass air sensor?
42:59>> Yeah. So,
43:01we are using our experience here and the
43:04data that we have collected to call for
43:07a turbo.
43:08So,
43:09she needs a turbo.
43:10>> Oh, yeah.
43:12>> All right. So, that's it, guys. We're
43:13going to leave this right over here. I
43:14am going to make an estimate and let the
43:18customer know. Hopefully, we're going to
43:20get the job. Once we get the approval, I
43:23will bring you guys back up so we can
43:25show you the new turbo, and then we will
43:27change the turbo, and I'm sure after we
43:29change the turbo, this vehicle is going
43:31to drive very well. Actually, when we
43:34took it on a test drive, it's driving
43:36somewhat okay.
43:37>> Okay.
43:38>> It's building boost, but I believe it's
43:40failing intermittently. I don't know if
43:42it's the wastegate that's sticking
43:44sometimes.
43:45>> Wastegate do that.
43:46>> Yeah. Because sometimes cuz when I was
43:48driving, there were times where it felt
43:49fine, and then when I revved it up all
43:51the way, it would only build up pressure
43:53up to like 17 PSI.
43:56>> Wow.
43:56>> Which is lower than normal, because this
43:57one should go all the way up to
43:59sometimes 30 uh PSI on the boost
44:02pressure. On you know, when you have a
44:04good trans um
44:05good turbo, not good transmission.
44:07Yeah, when you have a good turbo.
44:08>> Yeah.
44:09>> Yeah. Anyways, so, why don't you get in
44:12the comment section and let us know what
44:14you think about this. If you were
44:16diagnosing this,
44:18would you do something differently? If
44:20you were going to do this differently,
44:21let us know in the comment section. So,
44:23be on the lookout for part two of this
44:25video. We will let you know what the
44:27customer decides. Everybody, thanks for
44:29being here. If you're a subscriber
44:31coming back to watch this, I appreciate
44:33you. Thank you for bringing business to
44:35us. We're growing because of you. Our
44:37business is growing because of you and I
44:39can't thank you guys enough. We do not
44:41have a marketing budget. You are our
44:43marketing. Thank you. Thank you. Thank
44:45you. My man cameraman Kyler, thanks for
44:47being behind the camera. Once again,
44:49comments, questions, criticism, leave
44:51them in the comment box. If you're not a
44:52subscriber, please subscribe to our
44:54YouTube channel. I would really
44:56appreciate that.
44:56>> a thumbs up, too.
44:57>> Yeah. Give it a thumbs up. Not a thumb
44:59down, okay? Thumbs up, yeah. Thanks,
45:01Robin.
45:01>> You're welcome.
45:02>> Thank you, everybody.
45:04Uh, be on the lookout for a follow-up
45:06video. See you next time. All right,
45:08guys. I'm going to give you an update on
45:09this Audi Q8. We actually are not going
45:13to get the job. Uh, the customer has a
45:16warranty company that they were
45:19paying. We went back and forth with the
45:21warranty company and the warranty
45:23company didn't want to pay the full
45:25bill. They wanted the customer to pay a
45:27portion of the bill and the customer was
45:30not okay with that and uh, they told us
45:32that they're going to go ahead and not
45:35fix the vehicle. So, we're not going to
45:36get the job. The customer is going to
45:38pay for our diagnosis and then we're
45:40going to move on with another vehicle.
45:42Now, I might make another uh, video in
45:45the future about these warranty
45:47companies. I'm starting to notice a
45:49trend with a lot of the warranty
45:51companies out there. They are a pain in
45:53the butt to deal with. I'm starting to
45:55get to a point where I'm going to stop
45:57taking jobs that have to involve
45:59warranty companies. Let me know if you
46:01have a shop and uh, how do you deal with
46:04warranty companies because they can be a
46:06pain in the butt. We've dealt with about
46:07five of them right now and it's it's so
46:10time-consuming. At the end of the day,
46:12sometimes it's not worth it. So, I'm
46:14getting to the point where I'm going to
46:16start saying no to this. But, anyways,
46:18that's besides the point. We're going to
46:20get paid for a diagnosis time and we're
46:22going to give the vehicle back to the
46:23customer. Thanks for being here. I hope
46:25you like the video. If you like it, then
46:27give it a thumbs up. If you don't, then
46:29give it a thumbs down. But, if you do,
46:30tell us why so we can make better
46:32content
46:34here on the channel.
46:35Cameraman Kyler, thanks for being here.
46:38If you're not a subscriber, please
46:39subscribe. Thank you very much. See you
46:42guys next time.

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