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

Kelly Mayo

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

1 out of 1 people think this is helpful.

Nope- will try that as well. Thank smuch


And also the air filter ?

Your Answer

Add photo

Related Questions


Looking for a Used Bonneville in your area?

CarGurus has 859 nationwide Bonneville listings starting at $2,950.


Search Pontiac Bonneville Questions

Pontiac Bonneville Experts

#1 ticklemedaly
Reputation 350
#2 dandyoun
Reputation 300
#3 John Saffrahn
John Saffrahn
Reputation 280
View All

Related Models For Sale

Used Pontiac Grand Prix"
30 Great Deals out of 4,357 listings starting at $1,995
Used Chevrolet Impala"
934 Great Deals out of 35,696 listings starting at $1,500
Used Buick Regal"
190 Great Deals out of 10,672 listings starting at $2,195
Used Pontiac Grand Am"
1,981 listings starting at $1,995
Used Chevrolet Monte Carlo"
12 Great Deals out of 2,062 listings starting at $2,000
Used Buick LeSabre"
19 Great Deals out of 2,612 listings starting at $1,950
Used Chevrolet Camaro"
798 Great Deals out of 38,822 listings starting at $2,650
Used Pontiac GTO"
13 Great Deals out of 515 listings starting at $6,500
Used Chevrolet Malibu"
1,146 Great Deals out of 72,965 listings starting at $695
Used Pontiac Firebird"
9 Great Deals out of 904 listings starting at $2,900