SPONSORED LINKS

1999 Pontiac Grand Prix Idling very high

Tiny
ENEWMAN86
  • MEMBER
  • 1999 PONTIAC GRAND PRIX
Engine Performance problem
1999 Pontiac Grand Prix 6 cyl Automatic 160000 miles

I ran the car through some water, then got it all out. I changed the filter and cleaned the throttle body. I had the lifters changed, and now the car idles very high, about 2500 RPMs when in park and still tries to accelerate when the car is put into drive, about 1500 RPMs. What is this?
SPONSORED LINKS
Wednesday, September 30th, 2009 AT 12:32 AM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be a vacuum leaks or an idle air control valve problem try cleaning it out and see what happens. Also test the throttle position sensor.
Was this
answer
helpful?
Yes
No
Wednesday, September 30th, 2009 AT 6:36 AM
Tiny
ENEWMAN86
  • MEMBER
  • 2 POSTS
The throttle position is fine. Could this be the speed sensor? And how do I check for a vacuum leak? Is there a way to check the IAC valve or do I just replace it?
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Wednesday, September 30th, 2009 AT 5:46 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Try cleaning out the IACV
Was this
answer
helpful?
Yes
No
Thursday, October 1st, 2009 AT 11:27 AM

Please login or register to post a reply.

Related Engine Idle High Content

VIEW MORE

Sponsored links