V2 Throttle control problem

[bergstpg]

Before I start - this car is a beast!! Love it!! Kicks the tires off the Jeep SRT-8 I traded in last year. May not have bought it without support from this forum - being how the economy has been. Thanks.

Ok - bad news. I live in Minnesota and have put around 170 miles on the car since late Dec. For the most part - the temperature has been near or below zero since then. My problem is the car gets really jumpy around 30 miles an hour and after I take my foot off the accelerator (I know - what am I thinking ) - just over 1000 RPMs and when the car is still cold. Its like it wants to accelerate for a split second, then not the next split sec. On off on off etc. If I accelerate again - it goes back to smooth acceleration. After the car warms-up, it seems to not be as jumpy. Another note - as you can see by the number of miles - I haven't even gone through the break-in period and am hoping it will go away soon.

I baby the car for the most part - stays in garage and try to follow the recommended break-in recommendations. One upgrade I have done is to add snow tires, but I am not sure how this could be causing my problem.

Thoughts?

Thanks a ton in advance!!!

[wait4me]

Press the traction control once, then twice real quick and on the second click, hold down the button untill it says stability track off. Does the problem go away? If so, you may have moisture/ something messing with one of your sensors. There is ice on the ground while you are having this issue right? Be careful shutting off the stability system, when it is off there is NO correction...

[bergstpg]

I will give it a shot. I am going to fast for ice to be causing the traction control to be making adjustments during idle but it might be something tied to it.

Not only do we get to deal with ice, but cold roads. Tires have a hard time gripping this time a year. Thanks.

[LV_V]

Originally Posted by bergstpg

Before I start - this car is a beast!! Love it!! Kicks the tires off the Jeep SRT-8 I traded in last year. May not have bought it without support from this forum - being how the economy has been. Thanks.

Welcome! You will be blown away with the amount of useful, free information the collective minds of this forum will provide.

[Razorecko]

I'm guessing you have the auto 6spd correct ? I had a similar issue with a previous car and its not so much the throttle cable as it actually is the Traction Control Module on an automatic car.

[OldDrummer55]

Is the traction control compensating for traction slipping on the cold pavement/ice?

[bergstpg]

No - the road is completely clean - just cold. Shouldn't be the problem.

When I turned off the Stability Control - problem went away. Calling the dealership Monday.

Am I the only one experiencing this?

Thanks.

[jvp]

Originally Posted by bergstpg

No - the road is completely clean - just cold. Shouldn't be the problem.

Depends on how cold and what snow tires. Which tires did you add to the car? The Sottozeros? Or some other brand? What size? Stock sizes or different?

It may be that the snow tires that you've added, even though made for cold weather and cruddy roads, are still a little too hard for the car to deal with. On cold, dry roads, there may still be enough tire slip that it's causing your traction control to kick in.

Remember that tires get harder in the cold, even winter tires. Harder tires have less traction on dry roads than softer ones do. Combine that with the fact that your engine is producing mountains of torque in the freezing cold air... it makes perfect sense that you're engaging the traction control.

Here's another test: leave everything on, but put the car in manual mode. Start in 2nd or 3rd gear gently, and see what happens.

jas

[GMX322V S/C]

Originally Posted by bergstpg

No - the road is completely clean - just cold. Shouldn't be the problem.

When I turned off the Stability Control - problem went away. Calling the dealership Monday.

Am I the only one experiencing this?

Thanks.

There is at least one other report of surge with foot off accelerator in cold ambient: http://www.cadillacforums.com/forums...6-post233.html

[bergstpg]

Really?? The problem occurs at speeds of 30 or 40 miles an hour - with the car in idle. I can't believe that it is losing grip then .

The tires are Pirelli SOTTOZERO W240's. 255/40 R19's in the front and 285/40 R19's in the rear. $1700 at Discount Tire . They picked the size from corporate recommendations.

[Vrocks]

Originally Posted by bergstpg

No - the road is completely clean - just cold. Shouldn't be the problem.

When I turned off the Stability Control - problem went away. Calling the dealership Monday.

Am I the only one experiencing this?

Thanks.

I noticed the same thing here in PA when I test drove it. The temp was in the 30s and half throttle at low speed was breaking them free a little, so I just turned off the TC.

It sounds like your car is more sensitive than the one I drove so it may actually have a problem.

[jvp]

Originally Posted by bergstpg

Really?? The problem occurs at speeds of 30 or 40 miles an hour - with the car in idle. I can't believe that it is losing grip then

In what gear?

Did you try starting in 2nd or 3rd like I suggested?

jas

[bergstpg]

Haven't driven it yet - weather has been too crappy lately. Will test soon - however - it will be getting down to -17 below in Minneapolis this week . Not sure I want to expose it to those conditions.

[bergstpg]

Its going into the shop tomorrow afternoon. Hope to have something by tomorrow night.

[bergstpg]

Tonight - check engine light came on . Onstar diaognostics linked it a "miss firing" Who knows. 210 miles. I am trying to stay positive. Am I the only one with a black cloud floating over my V? Still going to the shop tomorrow.