I have a 99 Pontiac Bonneville the problem I am having is their is a knocking noise when I drive and when I stop it makes a popping noise. please help

Asked by Dec 02, 2014 at 11:25 PM about the 1999 Pontiac Bonneville 4 Dr SE Sedan

Question type: Maintenance & Repair

3 Answers

445

Read the "Service Issues" on the Pontiac V-6 here: http://www.underhoodservice.com/servicing-gm-s-3800-v6-engines/ The sounds you described remind me of a worn timing belt/jump timing, but it could be caused by many things. I would get a mechanic to check the engine timing, then move through other possible causes like a dead coil pack, gasket leak, ECU problem, etc.

It doesn't have the check engine light on

445

Could be poor/bad gasoline causing knocking and detonation, but I would still have it looked at even if check engine light is not on.

Your Answer

Bonneville

Looking for a Used Bonneville in your area?

CarGurus has 469 nationwide Bonneville listings starting at $3,499.

ZIP:

Pontiac Bonneville Experts

  • #1
    ticklemedaly
    Reputation
    390
  • #2
    Js08016
    Reputation
    360
  • #2
    dandyoun
    Reputation
    360
View All

Related Models For Sale

Used Pontiac Grand Prix
13 Great Deals out of 2,580 listings starting at $1,450
Used Chevrolet Impala
543 Great Deals out of 34,839 listings starting at $990
Used Pontiac Firebird
10 Great Deals out of 752 listings starting at $2,500
Used Ford Taurus
208 Great Deals out of 14,738 listings starting at $1,850
Used Buick LeSabre
8 Great Deals out of 1,717 listings starting at $999
Used Chevrolet Camaro
439 Great Deals out of 31,299 listings starting at $3,550
Used Chevrolet Monte Carlo
8 Great Deals out of 1,217 listings starting at $1,488
Used Pontiac Grand Am
1,035 listings

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.