Best Answer

There is no vacuum at the nipple on the EGR VALVE.

The Vacuum line that hooks to it should suck your finger when you speed the engine up. That line will come from the TBI ( Throttle Body Injection housing) and hook to the EGR valve, and when the engine RPMs. go up it sucks the EGR VALVE OPEN.


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Q: 1989 Chevy van with 305 and there is no vacuum coming from the egr vacuum is good at the throttle body though what could be the cause of this?
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