accelaration issue

Asked by Jul 12, 2016 at 02:08 PM about the 2003 Pontiac Bonneville SE

Question type: Maintenance & Repair

I have a 2003 Bonneville,3.8) which, my son uses at college.

Great car over all but lately it will gradually increase its acceleration on its own.   This may occur while it is at idle or while being driven.  It will usually slowly increase in RPMs from .08 up to 1.5 or even up to 3K RPMs at times.  This is usually more of an annoyance, but fear it may become a safety issue when it remains around the 3k RPMs.
I have replace MAF sensor, idle Control valve and the throttle control sensor but it still continues.
It ran great for a few days after replacing the idle control valve, but sure enough, after a few days the symptom appeared again.
The acceleration may occur when the car is cold, or when it is at running temperature.   

They only other symptom it has is that it will miss while shifting or appear to slip in and out gear, when this is occurring.  When it is running fine, it shifts quite smooth, but when the acceleration issue occurs, it will generally jerk while shifting gears as you accelerate.
The only other thing I could think of is a vacuum leak but have been unsuccessful in finding one in a hose or around intake.

Thanks for any help!!

3 Answers

25,465

you did replace the fuel filter....yes?

1 of 1 people found this helpful.

Nope- will try that as well. Thank smuch

18,800

And also the air filter ?

Your Answer

Add photo

Related Questions

Bonneville

Looking for a Used Bonneville in your area?

CarGurus has 511 nationwide Bonneville listings starting at $1,799.

ZIP:

Search Pontiac Bonneville Questions

Pontiac Bonneville Experts

#1 ticklemedaly
ticklemedaly
Reputation 380
#2 Js08016
Js08016
Reputation 360
#2 dandyoun
dandyoun
Reputation 360
View All

Related Models For Sale

Used Pontiac Grand Prix
30 Great Deals out of 2,863 listings starting at $1,600
Used Chevrolet Impala
591 Great Deals out of 34,068 listings starting at $899
Used Chevrolet Monte Carlo
20 Great Deals out of 1,419 listings starting at $1,995
Used Chevrolet Camaro
243 Great Deals out of 31,194 listings starting at $369
Used Pontiac Firebird
4 Great Deals out of 768 listings starting at $1,791
Used Chevrolet Malibu
1,060 Great Deals out of 77,910 listings starting at $1,500
Used Pontiac GTO
4 Great Deals out of 465 listings starting at $6,000
Used Pontiac Grand Am
1,183 listings starting at $1,599
Used Buick LeSabre
19 Great Deals out of 1,920 listings starting at $1,000
Used Ford Mustang
541 Great Deals out of 45,846 listings starting at $1,999
Used Honda Accord
948 Great Deals out of 77,757 listings starting at $899
Used Buick Regal
131 Great Deals out of 11,077 listings starting at $2,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.