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idle speed not speeding up with a/c on 200 1986

The A/C relay can cause low idle.

I'm not really sure why but the A/C relay can affect the idle speed. There is a short delay (<15 seconds) that occurs after starting before the idle will kick-up.

After starting your car...listen for the click (behind the center console). At that time, you will notice a difference in the idle speed. My '85 is the same as your '86 and I had to replace the relay.

I tried to find the thread in the archives but I couldn't find it.

Good luck.






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