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Re: 1972 c10 chevy truck troubleshooting!
Quote:
Originally Posted by VetteVet
Look around the intake manifold for an open port where a hose might go. You might have a large vacuum leak. If you just put in a carb kit you may have missed a port. If you have a vacuum gauge then put it on a manifold port and try to read around 18 inches of vacuum.
Do you have a brake booster? If so then pull the hose off of it at the manifold and plug the port. A bad brake booster will cause a vacuum leak. Vacuum leaks will make the engine run faster and
when the idle is turned down to compensate, then the off idle acceleration is affected and the vehicle will stall.
Block up the rear end and repeat the procedure. Check your timing. Retarded timing will give these symptoms.
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X3. Look for a large vacuum leak-brake booster or carb gasket come to mind but there are other small hoses too.
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'83 K20-TPI
'73 C10
'79 C10-ex-diesel(SOLD)
'07 Tahoe(Son driving)
'14 Suburban-DD
'71 C10-current project
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