2001 pontiac idle problem

2001 PONTIAC
Avatar
MICHELLEO
  • MEMBER
  • 2 POSTS
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.
Jan 26, 2007 at 1:20 PM
Advertisement
Avatar
MMPRINCE3000
  • ✓ASE Certified Mechanic
  • 133 POSTS
  • ASE Certified Mechanic
An idle that high is almost always a vaccum leak. Did you replace the O-rings on the injectors?
Jan 26, 2007 at 5:30 PM
Avatar
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?
Jan 29, 2007 at 12:54 PM
Avatar
MMPRINCE3000
  • ✓ASE Certified Mechanic
  • 133 POSTS
  • ASE Certified Mechanic
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.
Jan 30, 2007 at 4:37 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.