1993 Pontiac Grand Am Could it be a fuel filter problem?

Tiny
EVIL_MONKEY716
  • MEMBER
  • 1993 PONTIAC GRAND AM
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 156,000 MILES
When my car sits in idle and I press down on the gas pedal and then let off, the engine sounds like it revs up then down, then up and down agian on its own. It will do this for 10-20 seconds before it starts to idle normally. And when I drive between 15-20mph and let off the gas it will do the same thing unless I give it more gas then it act normally. I thought it may just need the fuel filter replaced but its not chocking and sputtering like I've heard other cars do.
Thursday, March 12th, 2009 AT 10:51 PM

1 Reply

Tiny
JAMES W.
  • MECHANIC
  • 2,394 POSTS
It doesn't sound like a fuel filter problem. Do get a check engine light while car is running? If yes, we'll need to know what the codes and descriptions are stored in the ECM's memory.
If no codes, un plug the idle speed control and ; 1 see if this triggers the check engine light. 2 drive the car around for a while and see if ISC being unplugged makes a difference in the performance. Let us know.
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Friday, March 13th, 2009 AT 1:29 AM

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