My car kinda rumbles or shakes to start

Asked by Sep 20, 2016 at 07:26 PM about the 2003 Pontiac Grand Am

Question type: General

I just put a new fuil pump and spark plugs and
wires on and it is still rumble when I try to start it

2 Answers

22,135

Shakes like it has bad motor mounts?

1 of 1 people found this helpful.

iac or coil planium top or a bad cat or a timing chain has went bad cousing it to stall out shack and rattle at stops but runs perfect while driving it finding out the cat will plug up and glow hot red at the back side of the cat but the back pressure from that being plugged up will cause back pressure to the engine causing the engine to spin backwards that then it streched the timing chain and causing the timing chain to skip a tooth or 2 ahead of time throwing the timing off on your engine i just went through all this this past week i kicked the cat out the exhaust system what that means is i cut the stupid cat out put a straight pipe in place of it cost me about 50.00 dollars with the clamps and hot heat weld putty and new timing chain set with guides and as good as new again those cats can cause a bad fire can blow up your car i changed it to a straight pipe and clamps and heat weld putty around the joints and good as new and o2 sensors work with this god bless my master degree in mechanics pays off . they do this on race cars too and on certain other vehicles as well . cats are no good but if you want to put a replacement one in go ahead you can get a replacement cat for 100.00 dollars ok have a nice day.

Your Answer

Pontiac Grand Am Experts

  • #1
    tenspeed
    Reputation
    8,000
  • #2
    John Saffrahn
    Reputation
    1,630
  • #3
    Tom Demyan
    Reputation
    1,620
View All

Related Models For Sale

Used Pontiac Grand Prix
8 Great Deals out of 2,418 listings starting at $1,900
Used Pontiac Firebird
6 Great Deals out of 690 listings starting at $3,911
Used Ford Mustang
347 Great Deals out of 41,847 listings starting at $1,488
Used Chevrolet Camaro
390 Great Deals out of 31,490 listings starting at $3,000
Used Chevrolet Impala
504 Great Deals out of 32,101 listings starting at $1,000
Used Pontiac GTO
3 Great Deals out of 391 listings starting at $3,950
Used Chevrolet Malibu
1,008 Great Deals out of 53,938 listings starting at $1,599
Used Pontiac Bonneville
4 Great Deals out of 407 listings starting at $1,995
Used Toyota Camry
1,124 Great Deals out of 76,737 listings starting at $1,100
Used Honda Civic
600 Great Deals out of 52,409 listings starting at $999
Used Honda Accord
802 Great Deals out of 89,313 listings starting at $1,444

Used Cars For Sale

2002 Pontiac Grand Am For Sale
102 listings starting at $2,295

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.