Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem
No ported vacuum???
mrk3cobra:
I have manifold vacuum at all the ports at idle, you said that you had no vacuum.
How do you tell if the plates are to far open at idle.
Schurkey:
--- Quote from: mrk3cobra on February 01, 2010, 02:23:44 PM ---How do you tell if the plates are to far open at idle.
--- End quote ---
Lower the idle speed and see if the vacuum at the ported nipples goes away.
mrk3cobra:
I lowered the idle to 550 RPMS and I still have vacuum at the ported ports.I could not lower the RPM any more then 550 and keep the truck running.
Cliff Ruggles:
"The Quadrajet is a new carb."
"New" from what source?....Cliff
mrk3cobra:
I just bought the truck, the last owner installed the quadrajet trying to fix the idle problem. Not sure were he purchased the carb, I removed the carb and it looks new.
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