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

17,485

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

Add photo

Related Questions

Search Pontiac Grand Am Questions

Pontiac Grand Am Experts

#1 tenspeed
tenspeed
Reputation 7,740
#2 John Saffrahn
John Saffrahn
Reputation 1,600
#3 Tom Demyan
Tom Demyan
Reputation 1,470
View All

Related Models For Sale

Used Pontiac Grand Prix
5 Great Deals out of 71 listings starting at $2,200
Used Ford Mustang
9 Great Deals out of 1,274 listings starting at $1,000
Used Chevrolet Camaro
764 listings starting at $2,500
Used Pontiac GTO
3 listings starting at $13,900
Used Chevrolet Impala
64 Great Deals out of 918 listings starting at $799
Used Chevrolet Malibu
122 Great Deals out of 2,319 listings starting at $2,966
Used Honda Accord
97 Great Deals out of 1,124 listings starting at $1,888
Used Honda Civic
339 Great Deals out of 4,244 listings starting at $999
Used Pontiac Bonneville
6 listings starting at $5,950
Used Toyota Camry
32 Great Deals out of 1,635 listings starting at $2,400
Used Nissan Altima
69 Great Deals out of 1,292 listings starting at $1,995

Used Cars For Sale

2005 Pontiac Grand Am For Sale
12 listings starting at $3,960

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.