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High idle

Tiny
PAUL RYAN
  • MEMBER
  • 2000 OLDSMOBILE INTRIGUE
  • 3.5L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 142,000 MILES
My car idles at 1500 to 2000 rpm after the accelerator has been pressed and does not come back down. The vehicle has a new IAC and MAF sensors any help would be greatly appreciated. Thanks
Tuesday, February 28th, 2017 AT 12:31 PM

7 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Try cleaning throttle plate on both sides and iac hole with choke cleaner check for a vacuum leak like broken hose, off etc.
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Wednesday, March 1st, 2017 AT 6:59 AM
Tiny
PAUL RYAN
  • MEMBER
  • 4 POSTS
Throttle plate is clean and from what I can see there is no vacuum leaks unless it's in the center of the intake I sprayed down all lines and the intake the best I could n no change
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Wednesday, March 1st, 2017 AT 2:58 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
The shaft for throttle plate may be sticky so check for freedom of movement was anything done prior to this happening it may be the car needs to be driven at 40 mph or higher for like a mile to reset the iac motor.
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Wednesday, March 1st, 2017 AT 3:15 PM
Tiny
PAUL RYAN
  • MEMBER
  • 4 POSTS
The throttle plate seems to move free and it has been driven around for about 20 min above and below 40 with no success I just find it odd that if I shut the car off n restart it idles ok for a few min then climbs and stays high
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Wednesday, March 1st, 2017 AT 3:30 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
No codes?What is fuel pressure?
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Wednesday, March 1st, 2017 AT 4:38 PM
Tiny
PAUL RYAN
  • MEMBER
  • 4 POSTS
It has a code for high idle and a cam sensor performance code the customer needed the car so I'll have to check the fuel pressure when it comes back next week
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Thursday, March 2nd, 2017 AT 6:52 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You should have said that at beginning about cam sensor and what code it was. This may be a cam sensor problem and need to check for a harness problem, poor connections or a stretched /jumped timing chain
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Thursday, March 2nd, 2017 AT 7:41 AM

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