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Idles rough at lights

Tiny
RAEANNE
  • MEMBER
  • 1999 PONTIAC GRAND AM
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 185,000 MILES
Thanks guys for the advice on cleaning the IAC on my 99 grand am. I went ahead and changed it and cleaned the hole it came out of with carb cleaner. It helped with the stalling, but the car seems to still idle pretty rough at stop lights when it is in drive. Do you have any further hints?
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Wednesday, July 20th, 2011 AT 1:33 AM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Make sure the fuel pressure regulator is not leaking fuel into the vacuum line. Remove the vacuum line and check for dampness. It will add too much fuel and make it run rough

Roy
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Wednesday, July 20th, 2011 AT 1:41 AM

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