i take my foot off the gas pedal the car will cut off?

2000 MERCURY MOUNTAINEER
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MASIETJ
  • MEMBER
  • 1 POST
i can start my car and as long as i have my foot on the gas pedal it will run if i take my foot off the gas pedal the car will cut off
Jan 17, 2008 at 10:01 AM
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SQM
  • ASE Certified Mechanic
  • 6,383 POSTS
  • ASE Certified Mechanic
Hello,

It sounds like you could have an issue with the idle air control valve (IAC).
It can be due to a dirty IAC can cause the vehicle not to idle. When a IAC gets dirty the air flow through the valve gets restricted. So the IAC cannot work as designed and the engine shuts off.

You can service the IAC by cleaning it out. Most cases this will improve the idle.

https://www.2carpros.com/articles/how-a-idle-air-control-valve-works
https://www.2carpros.com/articles/idle-air-control-valve-service

I have attached the diagrams for your reference.

Please let me know of any questions.
Thank you.

Sep 16, 2021 at 12:55 PM
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