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1990 Regal 3.1


aaaaamartin
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Hi all,

 

it's a couple of weeks now that the engine has an unstable idle. It almost stalls if bad enough.

 

This only happens when engine is warm, and running for 30 seconds or so.

 

Have attached TunerPro Capture. Works with the $88 definition.

 

Will someone please have a look. I'm not into this, especially when it comes to fuel mixture / integrators and so on.

 

What I did is visual inspect the IAC-Motor and spray-cleaning the throttle body.

 

Regards Martin

 

 

 

Unstable_Idle_1990_Regal_3.1.zip

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Clean the IACV as well as you can, and the seat. If it's IACV usually the idle quality will improve but nothing beats replacing it.

 

If you just crack the throttle body and the idle smoothes out that's a typical sign of a bad IACV as well.

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