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2001 Pontiac idle problem

Tiny
MICHELLEO
  • MEMBER
  • 2001 PONTIAC
Idles high when started. Replaced intake manifold gasket, and cleaned fuel injectors, but idle starts at 3000 RPM, and then sometimes it kicks down, but sometimes it doesn't.
Friday, January 26th, 2007 AT 1:20 PM

3 Replies

Tiny
MMPRINCE3000
  • MECHANIC
  • 133 POSTS
An idle that high is almost always a vaccum leak. Did you replace the O-rings on the injectors?
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Friday, January 26th, 2007 AT 5:30 PM
Tiny
MICHELLEO
  • MEMBER
  • 2 POSTS
No, I did not try that. I replaced the intake manifold gasket, and found a small leak on the oil pump, so replaced that gasket, but nothing else. No new codes come up on the computer. I have heard it could also be clogged fuel injectors, vaccuum leaks, or a AC sensor. Have you seen this?
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Monday, January 29th, 2007 AT 12:54 PM
Tiny
MMPRINCE3000
  • MECHANIC
  • 133 POSTS
Make sure the injectors are properly seated. You should be getting a code with an idle that high (when in closed loop).
The best way to diagnose this problem is to use a scanner and verify all sensors are in range.
If it idled properly before the repairs, then idled high afterwards, it is most likely the repairs caused it.
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Tuesday, January 30th, 2007 AT 4:37 AM

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