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
idle problems
1999 FORD CONTOUR
BLACKJACK1960
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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
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