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2002 Chevy Cavalier Idles low and hesitiates at crusing spe

Tiny
BLING79
  • MEMBER
  • 2002 CHEVROLET CAVALIER
  • 4 CYL
  • FWD
  • MANUAL
  • 89,000 MILES
When coming to a stop, engine warm or cold, the car will all of a sudden idle to about 400 rms and jump back up to normal. It has never stalled before. Also, when cruising on the interstate, while using cruise control or not using it, it will act as if it is struggling to find gas (pulsates). Fuel pump, fuel filter, spark plugs, had been replaced about 15,000 miles ago. PCM states EGR problem. I am thinking vacuum leak. Thoughts?
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Monday, March 31st, 2008 AT 1:06 PM

4 Replies

Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Check EGR operation
and for vacuum leaks
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Monday, March 31st, 2008 AT 10:00 PM
Tiny
BLING79
  • MEMBER
  • 3 POSTS
I forgot to mention that Cavalier ecotec engines do not have an egr valve. So it must be a vacuum leak?
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Tuesday, April 1st, 2008 AT 9:31 AM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS


https://www.2carpros.com/forum/automotive_pictures/99387_cav_3.jpg



is it California emission
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Tuesday, April 1st, 2008 AT 8:04 PM
Tiny
BLING79
  • MEMBER
  • 3 POSTS
No I live in Florida. I am sorry but I forgot to mention that I replaced the fuel pressure regulator also due to the bad egg exhaust smell. It is still there though.
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Wednesday, April 2nd, 2008 AT 11:11 AM

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