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idle not smooth

B

Bigjo-NH

Guest
When I stop at a light the idle does not seem smooth, the tac says 600 never fluctuates but it acts like a miss but it don't. I have changed the plugs ,cap,rotor. I have cleaned the TB and replaced the IAC and adjusted to spec. Other than that it runs great at all other throttle positions. It is an 89 with 17000 miles. all stock. Any Ideas?????
 

VetteGarage

Active member
Joined
Aug 11, 2002
Messages
34
Location
Washington, PA USA
Corvette
2004 Black Coupe
Check out the injectors. Use a digital voltmeter.. With the engine OFF: Unplug the electrical connection to the injector, measure the resistance you get when you prob the injector. Should be, I think, around 16 ohms. All the injector should be about the same. I recently replace all mine on my 89. I runs great now.
 

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