2003 Pontiac Grand Prix FUEL ISSUES

Tiny
ZACKIE31
  • MEMBER
  • 2003 PONTIAC GRAND PRIX
  • 230,000 MILES
Recently, my grand prix gt started experiencing what I believe to be fuel related issues. My car smells strongly of gasoline, loses or burns thru the gas at a very fast rate, and seems to chugg along. It also idles badly and will sometimes have a hard time staying running if its on an incline. My question is if this could be because of the catalytic converter being plugged up, or if it sounds like a major fuel leak or if it is an injector problem. Or maybe even a combination of things like maybe a vacuum problem coupled with a gas leak. Please give me some advice. Im no mechanic but am extremely mechanicly capable. Thank you for your time and attention
Saturday, August 3rd, 2013 AT 9:41 AM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
I would start with a compression test for each cylinder.

Check plugs, wires and coils for any signs of failure.

Look all around for any raw fuel leaks.

Yes, your cat converter can cause this. A back pressure test will confirm if it is failing.

Roy
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Sunday, August 4th, 2013 AT 12:30 AM

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