Strange acceleration issue - any ideas before I go to the dealership?

Vegitto-kun · 02-17-2011, 09:04 AM

this happens with my AT too.

if I suddenly stomp on the throttle in 4th or 5th it revs about 500 higher stays there for a second not accelerating and then the revs drop back down and it starts accelerating.

mostly happens around 2000-3000 revs

daisuke149 · 02-17-2011, 09:13 AM

actually to test if the clutch is beginning to slip, testing in higher gears is better.

my old clutch i could drive around low gears fnie, but I could not go full throttle in 5th gear (highest gear for that car) it would slip.

So, yes i would definitely say its the clutch.

also wearable items are covered for 12k miles under warranty against defects, not against wear though.

dmhenderson · 02-17-2011, 09:54 AM

I'm going to claim it has never worked properly (probably won't fly but worth a shot). About to leave for the dealership. Wish me luck.

dmhenderson · 02-17-2011, 11:58 AM

Verdict: Took it to a guy I know who worked for Altered Atmosphere and now works for a dealership. After a 20 minute test drive, he told me there's nothing wrong with the car. The tach was only spinning to about 5k before it grabbed. He said this is normal behavior that is regulated by the computer.

Told me if he was wrong, they'd definitely cover it under warranty and to call if the car got "squirrely".

Had other things to do with my tax refund anyway - w00t

spearfish25 · 02-17-2011, 12:01 PM

^WTF?

If I'm in 5th or 6th gear and floor it, the car surges forward at the same time as the RPM starts to rise. If your RPM jumps and the car has a delayed surge forward, you have a problem. There is no computer interaction happening there. If the revs went to 5k rpm in 5th gear and there was no slipping in the drive-line, you'd be doing over 130mph.

Red__Zed · 02-17-2011, 12:02 PM

Quote:

Originally Posted by spearfish25

^WTF?

If I'm in 5th or 6th gear and floor it, the car surges forward at the same time as the RPM starts to rise. If your RPM jumps and the car has a delayed surge forward, you have a problem. There is no computer interaction happening there.

dmhenderson · 02-17-2011, 12:22 PM

If it gets worse, I'll take it back. At least I have a shot at getting it fixed for free this way.

dmhenderson · 02-17-2011, 12:25 PM

I should mention it's not "lurching" - it just revs for a second and grabs. I dunno, I may have been overreacting.

Lug · 02-17-2011, 01:34 PM

Quote:

Originally Posted by dmhenderson

The tach was only spinning to about 5k before it grabbed. He said this is normal behavior that is regulated by the computer.

.....utter horseshit. The computer "regulates" a clutch to not engage for a moment? Why on earth would they even want to do that?

Cheech · 02-17-2011, 02:18 PM

There's lots of help and speculation on these replies. It might help to post a short youtube video of your speedo & tach (with radio off, so we can hear the engine).

my 2cents.....

houkouonchi · 02-17-2011, 02:24 PM

Yes a video is needed to help us know for sure what is going on =)

Quote:

Originally Posted by dmhenderson

Verdict: Took it to a guy I know who worked for Altered Atmosphere and now works for a dealership. After a 20 minute test drive, he told me there's nothing wrong with the car. The tach was only spinning to about 5k before it grabbed. He said this is normal behavior that is regulated by the computer.

Told me if he was wrong, they'd definitely cover it under warranty and to call if the car got "squirrely".

Had other things to do with my tax refund anyway - w00t

Um.. I would suggest not having him ever do anything on your car as he sounds like he doesn't know what he is talking about unless you aren't issue isn't what it sounds like you are describing to us.

kenchan · 02-17-2011, 02:24 PM

Quote:

Originally Posted by Triple's

Only 9k is irrelevant! People have smoke their clutch in a couple hundred miles.
If it's the clutch? Warranty may not cover it as it's a wear and tear item. Good Luck

This.

daisuke149 · 02-17-2011, 02:35 PM

it def doesnt hang for a second before "catching" unless your foot is on the clutch...

dmhenderson · 02-17-2011, 08:44 PM

yeah I'll try to take a video. Thanks for all the help.

cheshirecat · 02-17-2011, 10:39 PM

Note to self: Don't go to Altered Atmosphere for tech help

02-17-2011, 12:01 PM	#20 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1856	^WTF? If I'm in 5th or 6th gear and floor it, the car surges forward at the same time as the RPM starts to rise. If your RPM jumps and the car has a delayed surge forward, you have a problem. There is no computer interaction happening there. If the revs went to 5k rpm in 5th gear and there was no slipping in the drive-line, you'd be doing over 130mph. __________________ 2013 Cadillac V-Wagon, RIP Z

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02-17-2011, 09:04 AM	#16 (permalink)
Vegitto-kun A True Z Fanatic Join Date: Feb 2010 Location: USA Posts: 2,011 Drives: 09 370Z Rep Power: 262	this happens with my AT too. if I suddenly stomp on the throttle in 4th or 5th it revs about 500 higher stays there for a second not accelerating and then the revs drop back down and it starts accelerating. mostly happens around 2000-3000 revs

02-17-2011, 09:13 AM	#17 (permalink)
daisuke149 My *** is famous! Join Date: Mar 2010 Location: Alpharetta, GA Posts: 4,849 Drives: 2013 Boss 302 PW Rep Power: 31	actually to test if the clutch is beginning to slip, testing in higher gears is better. my old clutch i could drive around low gears fnie, but I could not go full throttle in 5th gear (highest gear for that car) it would slip. So, yes i would definitely say its the clutch. also wearable items are covered for 12k miles under warranty against defects, not against wear though.

02-17-2011, 09:54 AM	#18 (permalink)
dmhenderson A True Z Fanatic Join Date: Feb 2011 Location: Maryland Posts: 5,930 Drives: AWD TT 370z Rep Power: 26	I'm going to claim it has never worked properly (probably won't fly but worth a shot). About to leave for the dealership. Wish me luck.

02-17-2011, 11:58 AM	#19 (permalink)
dmhenderson A True Z Fanatic Join Date: Feb 2011 Location: Maryland Posts: 5,930 Drives: AWD TT 370z Rep Power: 26	Verdict: Took it to a guy I know who worked for Altered Atmosphere and now works for a dealership. After a 20 minute test drive, he told me there's nothing wrong with the car. The tach was only spinning to about 5k before it grabbed. He said this is normal behavior that is regulated by the computer. Told me if he was wrong, they'd definitely cover it under warranty and to call if the car got "squirrely". Had other things to do with my tax refund anyway - w00t

02-17-2011, 12:22 PM	#22 (permalink)
dmhenderson A True Z Fanatic Join Date: Feb 2011 Location: Maryland Posts: 5,930 Drives: AWD TT 370z Rep Power: 26	If it gets worse, I'll take it back. At least I have a shot at getting it fixed for free this way.

02-17-2011, 12:25 PM	#23 (permalink)
dmhenderson A True Z Fanatic Join Date: Feb 2011 Location: Maryland Posts: 5,930 Drives: AWD TT 370z Rep Power: 26	I should mention it's not "lurching" - it just revs for a second and grabs. I dunno, I may have been overreacting.

02-17-2011, 02:18 PM	#25 (permalink)
Cheech Premium Member Join Date: Sep 2010 Location: Sunshine Coast / So Cal Posts: 214 Drives: Frontier & Zed Rep Power: 14	There's lots of help and speculation on these replies. It might help to post a short youtube video of your speedo & tach (with radio off, so we can hear the engine). my 2cents.....

02-17-2011, 02:35 PM	#28 (permalink)
daisuke149 My *** is famous! Join Date: Mar 2010 Location: Alpharetta, GA Posts: 4,849 Drives: 2013 Boss 302 PW Rep Power: 31	it def doesnt hang for a second before "catching" unless your foot is on the clutch...

02-17-2011, 08:44 PM	#29 (permalink)
dmhenderson A True Z Fanatic Join Date: Feb 2011 Location: Maryland Posts: 5,930 Drives: AWD TT 370z Rep Power: 26	yeah I'll try to take a video. Thanks for all the help.

02-17-2011, 10:39 PM	#30 (permalink)
cheshirecat A True Z Fanatic Join Date: Jan 2009 Location: Florida Posts: 1,428 Drives: N54 135i Rep Power: 292	Note to self: Don't go to Altered Atmosphere for tech help