05 Cayenne V6 issue: Rough idle at start up, when idling at stop lights
#1
Rennlist Member
Thread Starter
05 Cayenne V6 issue: Rough idle at start up, when idling at stop lights
Has 106K miles. replaced plugs / coils about 30K ago. NO CEL.
So at start up, the truck idles very roughly, until you drop it in drive and accelerate. No issues during acceleration / running. But it vibrates again when idling at a stop light. Revving the motor cures the rough idle.
Maybe crank case vent valve? I would think if it was a vacuum leak or secondary air / fuel pump, it would throw a code?
Stumped!!
Thanks,
So at start up, the truck idles very roughly, until you drop it in drive and accelerate. No issues during acceleration / running. But it vibrates again when idling at a stop light. Revving the motor cures the rough idle.
Maybe crank case vent valve? I would think if it was a vacuum leak or secondary air / fuel pump, it would throw a code?
Stumped!!
Thanks,
#2
Rennlist Member
Thread Starter
Could it be motor mounts?
I was also thinking it could be motor mounts. The vibration is only in park or in drive at idle. Goes away once under way or by pressing the accelerator
I have done a lot of searches, but nothing seems to match up with what I am experiencing.
thanks again!!
I have done a lot of searches, but nothing seems to match up with what I am experiencing.
thanks again!!
#3
Burning Brakes
Did you figure out what was wrong? I am having similar issue as well.
thanks!
thanks!
#4
Rennlist Member
Sticky throttle body could do it. Look through here for a few possibilities. http://www.pelicanparts.com/techarti...yenne_Tech.htm
#7
Burning Brakes
Thanks for your input, rob76turbo. I was thinking the same too. I will check the mounts this weekend.
Endless: I will check the throttle body as well. It is easy to check.
kjbu: Mine is a V8.
Thanks all...
Endless: I will check the throttle body as well. It is easy to check.
kjbu: Mine is a V8.
Thanks all...
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#8
Burning Brakes
Update: It was the engine torque damper/strut. Replaced it last night and engine is smooth and quiet.
#10
Burning Brakes
Engine damper is on the top of the engine while the mounts are in the bottom. different things...
#12
1st Gear
Join Date: May 2021
Location: Vancouver BC Canada
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Is engine mount replacement a easy job?
I am thinking engine mount issue. So did you remember how hard to replace it? Is that possible to DIY?
thanks
#13
Burning Brakes
Bottom line was the original engine was made whole again after the dribbler was isolated and replaced.
Keep an eye on your oil level and smell for gas.
Rob I'm sure has the link to that story.
Last edited by Ericson38; 05-31-2021 at 09:48 PM.
#14
Rennlist Member
The times my VR6 has run rough, it was because of a failing coil.
#15
Track Day
Does this video resemble what you guys were experiencing? My 955 cayenne does not accelerate at first attempt. Almost like it is trying to find the gear? But after that first attempt, it seems to accelerate normally. But the grinding rhythm in that video continues for about another ten minutes. I feel it in the small of my back, coming in and out.