Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem
Carb not squirting fuel after warmup
59bluesilver:
After thinking about this and my situation, the clogging of the sock is the one that fits my problem best. When I recently installed the new sending unit I noticed the old unit didn't have one. I don't know if it rotted away over the years or never had one to begin with. I have hopes that this pressure test will confirm.
59bluesilver:
Finally got around to draining the gas and removing the sending unit. Sock was not plugged, looked good. While the bottom of the tank had this black crusty material it wasn't getting into the gas, siphoned gas was clear. I blew out the line and replaced the filter. I have yet to do the pressure test. Does anyone think this still should be done or should I be looking at the carb?
motorvation2go:
I can only speak for myself and respect that all choices are yours.
Logical sequence is a good thing though.
1. I'd have a clean tank to start with.
2. I'd still do the running pressure test... who knows, might(?) be a dud fuel pump.
If the pressure is good but the engine's starving it's [without question] time to get into the carb.
*Admittedly, you might (first) just pull the carb apart and find a mess in need of cleaning/rebuild.
Might fix everything... and maybe not! :o
If you haven't checked the supply side first (running pressure test) it's a crap shoot.
Check the 'running' pressure first. ;)
429bbf:
question what kind of rig is this . is this the original carb? you say you have a new electric fuel pump? are you pulling or pushing through the old mechanical. i seen that cause lots of problems. fwiw.
von:
The tricky thing about the sock is that it only clogs when the engine is running under load and the debris slowly falls off after the engine is shut off or idling. I'd remove the sock and install an in-line filter that's easily changed.
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