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

22,695

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

1 out of 1 people think this is helpful.

Nope- will try that as well. Thank smuch

18,230

And also the air filter ?

Your Answer

Add photo

Related Questions

Bonneville

Looking for a Used Bonneville in your area?

CarGurus has 542 nationwide Bonneville listings starting at $3,699.

ZIP:

Search Pontiac Bonneville Questions

Pontiac Bonneville Experts

#1 ticklemedaly
ticklemedaly
Reputation 380
#2 dandyoun
dandyoun
Reputation 360
#3 Js08016
Js08016
Reputation 350
View All

Related Models For Sale

Used Pontiac Grand Prix
18 Great Deals out of 2,919 listings starting at $1,995
Used Chevrolet Impala
523 Great Deals out of 29,877 listings starting at $799
Used Pontiac Firebird
6 Great Deals out of 745 listings starting at $2,500
Used Chevrolet Monte Carlo
17 Great Deals out of 1,380 listings starting at $1,995
Used Buick LeSabre
7 Great Deals out of 1,964 listings starting at $1,500
Used Ford Mustang
388 Great Deals out of 47,511 listings starting at $1,800
Used Buick Regal
98 Great Deals out of 10,289 listings starting at $3,495
Used Pontiac Grand Am
1,254 listings starting at $1,593
Used Chevrolet Camaro
148 Great Deals out of 32,614 listings starting at $1,729
Used Pontiac GTO
3 Great Deals out of 457 listings starting at $5,995
Used Cadillac DeVille
5 Great Deals out of 1,623 listings starting at $2,800