Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem
rebuilt dualjet, now flat spot
Cliff Ruggles:
Did you install new "O" rings into the upper idle airbleed adjustment?
1clnlj:
--- Quote from: Cliff Ruggles on May 18, 2016, 01:38:51 AM ---Did you install new "O" rings into the upper idle airbleed adjustment?
--- End quote ---
Yes, new o rings were installed on idle air bleed valve.
Cliff Ruggles:
Did you clean the idle tubes or remove them for cleaning during the rebuild. Even when we don't pull them out here we always manually clean them by taking an old pump return spring and straightening it out to run thru them.......Cliff
1clnlj:
I did not clean the idle tubes. I have a guy that is going to go back through this thing and hopefully get it back up and running.
Thanks for all your help.
Cliff Ruggles:
Probably less than 1 percent of anyone who works on these carbs even knows what idle tubes are or where they are located. They are pressed into the main casting with tiny holes in the bottom of them. Cleaning the carb during rebuilding often cuts enough varnish/dirt/debris loose to plug them up, and they get plugged up slowly over years of use from drying up cycles with "varnish" and other residue from the fuel.
At a minimum clean them out manually, we prefer to pull them out here and clean them with sized drill bits in a pin vise......Cliff
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