RPM jump when accelerating??

[travw3]

I noticed the car acting a little strange after I got the tires rotated. The RPM's would jump and go back down when accelerating. I figured just have them rotate them back when getting the new wheels, they did and same problem.. any ideas of what it could be? Also the jump wasn't as bad before the tune, so it seems more power the more jump.

[Tropicgreena4]

I can't view the video here at work, but it kinda sounds to me like maybe a slipping clutch?

[highPSI-S4]

I can't view the video here at work, but it kinda sounds to me like maybe a slipping clutch?

X2

[Apat]

X3

99.9% sure its the clutch. Mine did the same thing when it was on the way out @73k

[Slow4]

Question:

Wouldnt a slipping clutch jump at 2/3K vs 5K since the engine is building up power on the front end vs tapering off on the back end?

[M|R]

Sounds like slippage to me...

[Amsterdamned]

What gear were you in?

[Apat]

Question:

Wouldnt a slipping clutch jump at 2/3K vs 5K since the engine is building up power on the front end vs tapering off on the back end?

My clutch would only slip in the top 3 gears and at pretty much all rpm levels if I got on it.

[Slow4]

My clutch would only slip in the top 3 gears and at pretty much all rpm levels if I got on it.

Ah, I see.

My experience has been in 3rd-5th and RPMs boost at 2400-3000; now I know....

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[ECS Tuning-Audi]

Auto or manual?

Jason

[B6JoeS4]

It's a manual. No PRNDS at the bottom of the DIS

Doesn't sound like a slipping clutch to me. Are you guys even watching the video or saying what everyone else is saying? He isn't accelerating hard or anything like that. Just cruising at 4k and then it surges by itself.

Get a VAGCOM and scan the car. I would guess it's a bad MAF or something along those lines

[ECS Tuning-Audi]

It's a manual. No PRNDS at the bottom of the DIS

Doesn't sound like a slipping clutch to me. Are you guys even watching the video or saying what everyone else is saying? He isn't accelerating hard or anything like that. Just cruising at 4k and then it surges by itself.

Get a VAGCOM and scan the car. I would guess it's a bad MAF or something along those lines

Good catch, I watched the video and didn't even notice that - I was watching the tach the whole time.

MAF could also be a problem, going off that possibly throttle body issues? The DBW could be getting a bad signal - VAGCOM would be your best bet for that sort of diagnostics.

If it's a slipping clutch its going to slip under high load like going up a hill in 4th or 5th gear at low rpm's. If it passes that I'd start looking towards the other suggestions.

Jason

[Apat]

Looks to me like he's cruising in 5th steps on the gas and the RPMs jump up due to possible slipping clutch. Clutch grabs. RPMs go back to normal. Rate of MPH increase, increases(if that makes sense haha). That's exactly what mine did when the clutch was going out.

Now if he isn't stepping on the gas and it does this by itself then bring the car to a exorcist...lol

[Tropicgreena4]

Are you guys even watching the video or saying what everyone else is saying?

my original reply starts out by saying I can't watch the video at work... my diagnosis was pure speculation.

[PashaS4]

It looks like its the clutch to me, mine did the same thing but a lot worse.

Good luck though, I would check with a vagcom before you do any clutch purchasing.

[travw3]

What gear were you in?

I was in 4th there, but it happens 2nd-6th

[travw3]

Auto or manual?

Jason

manual

[travw3]

Thanks everyone, I had it out the Audi dealer and they didnt really get time to look it that much over because as soon as I got my tune back in I wanted it. They told me they had the master audi tech come out and look and they were saying it was the tires.

When I accelerate I push down about 10-30% int the video.

[B6JoeS4]

my original reply starts out by saying I can't watch the video at work... my diagnosis was pure speculation.

Don't take it personal. It wasn't directed at only you

Thanks everyone, I had it out the Audi dealer and they didnt really get time to look it that much over because as soon as I got my tune back in I wanted it. They told me they had the master audi tech come out and look and they were saying it was the tires.

When I accelerate I push down about 10-30% int the video.

Tires??? How is that possible?

[travw3]

They said they think because the tire wear is uneven that its causing the car to think the tires aren't getting grip..

[PashaS4]

Turn your traction off and than try the same thing, if it still does the same thing than those techs are full of shit in my opinion.

[B6JoeS4]

I think they're full of shit either way. If some are 100% bald and some are brand new, that's still not enough to trip up the esp. You would be getting a flashing ESP light on the dash every time it does this too

Fuck them for trying to sell you new tires like that

[EUROSWAGR]

This has nothing to do with your tires...it looks exactly like what has happened to me in my 6spd 1.8t GLI when the clutch started slipping.

[EUROSWAGR]

Looks to me like he's cruising in 5th steps on the gas and the RPMs jump up due to possible slipping clutch. Clutch grabs. RPMs go back to normal. Rate of MPH increase, increases(if that makes sense haha). That's exactly what mine did when the clutch was going out.

Now if he isn't stepping on the gas and it does this by itself then bring the car to a exorcist...lol

I Agree

[Slow4]

Doesn't sound like a slipping clutch to me. Are you guys even watching the video or saying what everyone else is saying? He isn't accelerating hard or anything like that. Just cruising at 4k and then it surges by itself.

That's what I was saying, why would it jump at the midrange/tail end vs the beginning during acceleration.

[M|R]

Doesn't sound like a slipping clutch to me. Are you guys even watching the video or saying what everyone else is saying? He isn't accelerating hard or anything like that. Just cruising at 4k and then it surges by itself.

Im leaning toward a slipping clutch for many reasons. He has over 80k miles on the car - prime territory for a clutch job it seems, he accelerates and the rpms rise while the mph stay constant, then the rpms drop a little and he starts to pick up speed, and the sound just reminds me of clutch slippage. Its extremely hard to diagnose over a computer but that seems like the most logical without being there and seeing/feeling how the car reacts.

OP, put the car in 6th on a flat highway and give it a good amount of gas. If the rpms rise un-proportionally to the mph, I think we found your culprit.

[B6JoeS4]

How about this: OP, do a strong pull from a stop from 1st gear. If it's the clutch, it will slip instantly when you hit 2nd

[EUROSWAGR]

From what I've seen a clutch usually starts to slip in higher gears before lower ones, even if your not at 100% throttle. The torque seen by the clutch from the wheels is greater in a high gear than in a lower gear. Low gears would reduce the torque seen by the clutch from the wheels. IE The torque is reduced by the gear ratio in the transmission

[M|R]

From what I've seen a clutch usually starts to slip in higher gears before lower ones, even if your not at 100% throttle. The torque seen by the clutch from the wheels is greater in a high gear than in a lower gear. Low gears would reduce the torque seen by the clutch from the wheels. IE The torque is reduced by the gear ratio in the transmission

Agreed. 6th gear with a good amount of throttle should give you an idea. If you decide to try this, let us know what happens.

[B6JoeS4]

When mine was going I got tons of slip in 2nd. Either way works

[BrianL]

Low revs, high gear (5th @ 25mph), floor it, if you rev, and don't accelerate, it's the clutch.

[M|R]

When mine was going I got tons of slip in 2nd. Either way works

Yup. Probably just depends how far gone your clutch is...

[travw3]

I'll try all these suggestions tomorrow and let you guys. Thanks for all the advice.

[JRMSLINEA4]

I noticed the car acting a little strange after I got the tires rotated. The RPM's would jump and go back down when accelerating. I figured just have them rotate them back when getting the new wheels, they did and same problem.. any ideas of what it could be? Also the jump wasn't as bad before the tune, so it seems more power the more jump.

Clutch for sure.

[travw3]

Its the clutch, I did everything you guys said and same results. How long can my clutch last me? I don't have the $ to get a new one and for labor.

[M|R]

Its the clutch, I did everything you guys said and same results. How long can my clutch last me? I don't have the $ to get a new one and for labor.

If it really is necessary to drive more on it, make sure to take it easy but it really depends on your driving habits when judging how long it will last.

[B6JoeS4]

Try to skip gears as much as possible and use common sense to be easy on it. Not very long though once it gets like that.

[travw3]

Do I need to replace the flywheel too? Or will it be good with the one that is in there?

[JRMSLINEA4]

Do I need to replace the flywheel too? Or will it be good with the one that is in there?

Yes.

[EUROSWAGR]

Its the clutch, I did everything you guys said and same results. How long can my clutch last me? I don't have the $ to get a new one and for labor.

and try not to engine brake...aka downshift too much or at all. I know it will wear the brakes a little more, but downshifting heats up your clutch too. You should be fine if you don't beat on it for a while.