You are right, at this point I am desperate and have tried everything suggested, about ready to get a Holley and see what happens...

 

have you tried running thin wires though all the passages in the carb.?

 

No, the compressed air has been blowing fine through all the passages.

Going to take off the Primary Venturi Boosters themselves and have a look even though the Edelbrock Tech said this was not an issue. Found an article on the web where this was causing the same problem and it's the only thing left inside the carb I haven't checked yet.

 

After reading numerous posts on various sites the problem was the idle set too rich and fuel was by passing the Idle Discharge Port on the bottom of the throttle blade!!!

You need to adjust one idle mixture screw for the highest hg reading then the other one, after that go back and set your idle and repeat until the fuel stops pouring in the venturis and you have a good idle. Also advancing the distributer a bit will help with this problem as well.

Need to do some fine tuning now with the metering rod springs and I think 15hg of vacuum is too much??? Oh yeah, went out and bought a Vacuum Gauge which I can also use to check fuel pressure!

 

Here is a good article about your vacuum gauge readings.

Joe.

 

Nice! Thank's

 

Yes! the old "over exposing the idle transfer slot thing" Solved on my
Camaro by drilling a small hole in the primaries butterflies!

 

Yeah that was going to be my next thing to try also, glad I found out before drilling the holes!

Used the new vacuum gauge to test my fuel pump tonight and found out my stock fuel pump was also part of the problem as it's putting out 7psi without the regulator. Looks like I had two problems at once going on, no wonder the guy I got the car from couldn't get it to idle!

 

HAVE CHYRSLER 383 PROFESSIONALLY BUILT AND DYNO TUNED WITH QUICKFUEL SS780VS CARB.

ENGINE RUNS GREAT FOR 6 MILES, THEN BEGINS TO MISS AND STALL, PUMP GAS TO RECOVER, EASY TO RESTART BUT CONTINUES STALLING.

THEN PARKED, AND RUN AT IDLE, IT STALLS AFTER A MINUTE WITH OBSERVED CONSTANT FUEL PRESSURE AND FUEL LEVELS AT CARB.

RAN WITH TANK OPEN, AIR CLEANER OFF, FUEL PRESSURE 7 LBS, FUEL LEVEL CONSTANT, CARB SPACER IN PLACE, ENG TEMP 165 CONSTANT, CONSTANT MSD IGNITION TIMING @ 16 DEGREES

POSSIBLILITIES: QUICKFUEL CARB ? LOW FLOATS ?? VAPOR LOCK ? SCREW-IN AIR BLEEDS ?? MSD IGNITION DIST ?