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High Idle

Demaz58

New member
Joined
Jul 31, 2018
Messages
1
Location
Yuma, Arizona
Corvette
1984 Silver
Hello all, I recently bought a C4 ran good for 3 days still starts and runs but idle is at 10 - 13. Seems way to high. Doesn't get any lower the longer it runs. Any ideas on what it can be ?
 
Hello all, I recently bought a C4 ran good for 3 days still starts and runs but idle is at 10 - 13. Seems way to high. Doesn't get any lower the longer it runs. Any ideas on what it can be ?

1. IAC (Idle Air Control Valve)
2. Throttle Body needs cleaning
3. Manifold vacuum leak.
 

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