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Q: Engine Idle surge after warm with no load on 1990 Chevrolet Corvette

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
The engine idle surges until I turn on the air conditioner.. No vacuum leaks found.. what could be the problem.. THought might be head gasket, checked the block for leaks and nothing... In need of help..
(1) Answer
Check you ignition wires ASAP, I have replaced wires on Vettes of this era for this very problem which is a hunting or surging idle, with out any load that goes away with the A/C on.

here are some shops:

https://repairpal.com/directory?address=76052&car_brand_names=Chevrolet
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