Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

Q-jet flooding under load

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Cliff Ruggles:
I don't like to see past 6psi on those early carburetors for any reason.  The later designs will easily take more pressure without any issues, but I've tested enough of the early carbs to know that they can be problematic with high fuel pressure.....Cliff

rwberinger4x4:
I'm wondering how accurate the gauge is - It bounces between 7 and 10 at idle, but then smooths out and drops to around 6PSI when I put about 1800 RPM to the engine.  I'm not sure which reading I should trust more. 

What's weird is that it loads up/floods when the gauge is reading 6 PSI (running at 1500-200 RPM) but will continue to idle and NOT flood when the gauge is bouncing between 7 and 10...

rwberinger4x4:
Even weirder is it will try to flood, but won't actually stall, when sitting still, but floods in about 100 yards of actual slow driving.

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