Ep91 very high idle

[coleeey]

Hi guys sometimes when I start the engine idle is around 1500, but then other times its about a 1000. I have taken the throttle body off cleaned it all out and checked all vac pipes does anyone have any idea what would cause this.

Thanks

 

[Jay]

On a cold start the engine will hold a higher RPM until it reaches operating temperature. Worth confirming if that's what you are noticing matey.

 

[weeJohn]

Use the search function at the top right of the page, loads of threads about this problem.

 

[wildchild]

check for loose connections at the thermostat/temp sender.
Also check the IAC valve.

 

[Paul_JJ]

Hi guys sometimes when I start the engine idle is around 1500, but then other times its about a 1000. I have taken the throttle body off cleaned it all out and checked all vac pipes does anyone have any idea what would cause this.

Thanks

This is how it should be. THere is nothing wrong with the car. When the engine is cold you'll get 1500 RPM when hot ideally it should be around 750 RPM.