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What would be the reason for rough idle after my car get warm its a 1.8 w/FI. It seems like everything else is normal starts great and runs good but doesn't like idling when warm.

 

Thanks, Joe

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I don't know much about the FI models, but I know that the people here who do will probably need more info - what type of FI do you have? (SPFI, or MPFI). What year is the engine, and what car is it on?

 

GD

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Joe, The problem you are having is common on SPFI cars.

The IAC (Idle Air Control) valve wants it's shuttle cleaned.

They have a tendency to get varnish on them and stick.

This control valve is mounted on the front of your throttle body, has a cylinder with wires going to it.

It can be removed and cleaned with carb cleaner.

Hope this helps

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Think I got it figured out the top of my cover over the spfi was sunk down in and not getting enough air through. I lifed it up and now it seems to be fine. It was down about an inch and half.

 

JL

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