idle problems

1999 FORD CONTOUR
125,000 MILES • 2.0L • 4 CYL • FWD • AUTOMATIC
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BLACKJACK1960
  • MEMBER
  • 1 POST
my car at idle in park, after you start it up it races high rpm and then drops to low rpm. it cycles up and down. IAC valve problem?
Aug 3, 2017 at 5:29 AM
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,178 POSTS
Hello,

It sounds more like a vacuum leak or MAF is out of range. Here are some guides to help you run some simple tests.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

and

https://www.2carpros.com/articles/replace-an-air-intake-boot

and

https://www.2carpros.com/articles/how-to-replace-a-mass-air-flow-sensor-maf

and

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please run some tests and get back to us we are interested to see what it is.

Cheers, Ken
Aug 3, 2017 at 3:27 PM
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