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Problem for Chevrolet 1986 K1500
I have a 1986 checy 4x4 , plugs replaced, fuel
By coorslight27 on Jun 17, 2009
I have a 1986 checy 4x4 , plugs replaced, fuel filter air filter...Idle is really high and now after i let off the gas pedal is still goes around 80 km's, and will not slow???
Clarification Request
Posted by automotivexc on Jun 17, 2009
Is this a carburetor or fuel injected model?
Solution #1
posted on Jun 17, 2009
If this is a 4.3 liter V-6, they are notorious for throttle body to intake manifold gasket air leaks.
You can use a long piece of heater hose or air hose to find the vacuum leak. Place one end of the hose to your ear and use the other end to search for the leak. Move the hose over the engine while engine is running and listen for a "hissing" sound.
Repair the leak, disconnect the negative battery cable for 3 to 5 minutes, start the vehicle and drive or 45 mph for 5+ miles. The IAC will relearn and the idle should return to normal.
Good luck, let me know.
Regards,
You can use a long piece of heater hose or air hose to find the vacuum leak. Place one end of the hose to your ear and use the other end to search for the leak. Move the hose over the engine while engine is running and listen for a "hissing" sound.
Repair the leak, disconnect the negative battery cable for 3 to 5 minutes, start the vehicle and drive or 45 mph for 5+ miles. The IAC will relearn and the idle should return to normal.
Good luck, let me know.
Regards,
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