Throttle jerking while stopped!

Brutal 370Z · 06-30-2011, 08:08 PM

Hoping someone can explain this issue. My 08' g37s coupe AT has been wanting to rev on it's own when I'm stopped. It's pretty scary! I'll be at a stoplight and the throttle will start to rev and jerk the car. I have to hold down the break real hard or put it into park to keep it from speeding forward! Also, I've noticed that when the car automatically downshifts, it's very rough and it seems to jerk forward quite a bit. Could this be a transmission issue? If so, what exactly is wrong and is it covered under warranty?

TreeSemdyZee · 06-30-2011, 11:23 PM

Sounds like transmission to me. Have you checked your fluid level?

Brutal 370Z · 07-02-2011, 01:12 PM

Nope haven't checked fluid level but it was just in for service about 2000km ago.

nogoodname · 07-02-2011, 01:15 PM

It's the car's computer... go to the dealer and get it flashed. happened to me in a g37 and was like wth is going on.

Brutal 370Z · 07-02-2011, 11:39 PM

Quote:

Originally Posted by nogoodname

It's the car's computer... go to the dealer and get it flashed. happened to me in a g37 and was like wth is going on.

Thanks! I'll be sure to bring it in ASAP to get that checked out.

EVOHUNTER · 07-05-2011, 12:10 PM

Maybe your TPS?

ChrisSlicks · 07-05-2011, 01:36 PM

The throttle position sensor needs to be recalibrated in the ECU or the sensor replaced. Typically they just replace the whole pedal unit and re-calibrate if the voltages are out of range.

Brutal 370Z · 07-05-2011, 01:42 PM

oh and i should add, at the same time that I began having this issue, my outdoor teperature gage has been consistently inacurate by about 10 degrees over actual.

zcar_dad · 07-05-2011, 01:46 PM

Quote:

Originally Posted by Brutal 370Z

Hoping someone can explain this issue. My 08' g37s coupe AT has been wanting to rev on it's own when I'm stopped. It's pretty scary! I'll be at a stoplight and the throttle will start to rev and jerk the car. I have to hold down the break real hard or put it into park to keep it from speeding forward! Also, I've noticed that when the car automatically downshifts, it's very rough and it seems to jerk forward quite a bit. Could this be a transmission issue? If so, what exactly is wrong and is it covered under warranty?

Had this problem on an older Z and it was the accelrator linkage sticking. Was able to fix it my apply lube to it. don't know for sure if this is what is causing it.

Brutal 370Z · 07-05-2011, 01:57 PM

hmmm that could be another possibility. I think I'm just going to take it in the the dealership and see if they can figure it out.

06-30-2011, 08:08 PM	#1 (permalink)
Brutal 370Z Enthusiast Member Join Date: Jun 2011 Location: Greater Toronto Area Posts: 357 Drives: 11' MB/Pers/6M/S/Nav Rep Power: 13	Throttle jerking while stopped! Hoping someone can explain this issue. My 08' g37s coupe AT has been wanting to rev on it's own when I'm stopped. It's pretty scary! I'll be at a stoplight and the throttle will start to rev and jerk the car. I have to hold down the break real hard or put it into park to keep it from speeding forward! Also, I've noticed that when the car automatically downshifts, it's very rough and it seems to jerk forward quite a bit. Could this be a transmission issue? If so, what exactly is wrong and is it covered under warranty? __________________ Stillen G3/CBE/HFC, Nismo S-tune Front Chin Spoiler, 20% tint, Password JDM V2 Shift Knob

07-02-2011, 01:12 PM	#3 (permalink)
Brutal 370Z Enthusiast Member Join Date: Jun 2011 Location: Greater Toronto Area Posts: 357 Drives: 11' MB/Pers/6M/S/Nav Rep Power: 13	Nope haven't checked fluid level but it was just in for service about 2000km ago. __________________ Stillen G3/CBE/HFC, Nismo S-tune Front Chin Spoiler, 20% tint, Password JDM V2 Shift Knob

07-05-2011, 01:36 PM	#7 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 653	The throttle position sensor needs to be recalibrated in the ECU or the sensor replaced. Typically they just replace the whole pedal unit and re-calibrate if the voltages are out of range. __________________ Hotchkis ARB \| Stillen CAI \| Art Pipes \| Berk CBE \| Stillen AP Racing Brakes \| AE Performance Oil Cooler \| BC Racing ER Coilovers \| Doran Control Arms

07-05-2011, 01:42 PM	#8 (permalink)
Brutal 370Z Enthusiast Member Join Date: Jun 2011 Location: Greater Toronto Area Posts: 357 Drives: 11' MB/Pers/6M/S/Nav Rep Power: 13	oh and i should add, at the same time that I began having this issue, my outdoor teperature gage has been consistently inacurate by about 10 degrees over actual. __________________ Stillen G3/CBE/HFC, Nismo S-tune Front Chin Spoiler, 20% tint, Password JDM V2 Shift Knob

07-05-2011, 01:57 PM	#10 (permalink)
Brutal 370Z Enthusiast Member Join Date: Jun 2011 Location: Greater Toronto Area Posts: 357 Drives: 11' MB/Pers/6M/S/Nav Rep Power: 13	hmmm that could be another possibility. I think I'm just going to take it in the the dealership and see if they can figure it out. __________________ Stillen G3/CBE/HFC, Nismo S-tune Front Chin Spoiler, 20% tint, Password JDM V2 Shift Knob

06-30-2011, 11:23 PM	#2 (permalink)
TreeSemdyZee Premium Member Join Date: Dec 2009 Location: Kentuck-IANA Age: 59 Posts: 4,880 Drives: '09 370 & ‘14 Juke Rep Power: 27408	Sounds like transmission to me. Have you checked your fluid level?

07-02-2011, 01:15 PM	#4 (permalink)
nogoodname Lifetime Premium Join Date: Nov 2008 Location: Montreal Posts: 22,357 Drives: E46 M3 Rep Power: 1764	It's the car's computer... go to the dealer and get it flashed. happened to me in a g37 and was like wth is going on.

07-05-2011, 12:10 PM	#6 (permalink)
EVOHUNTER Track Member Join Date: Jul 2011 Location: Edmonton, Canada Posts: 681 Drives: BOOSTED3-7-0 Rep Power: 14	Maybe your TPS?

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