Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

Carburator cuts out

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Tstates:
Recently rebuilt carb with HP kit from Cliff.  It ran fantastic for 2 Months, then all of the sudden when I hit the gas it goes hard for 2 seconds qand then acts like it is not getting gas.  Replaced fuel pump and checked filter, and it still cuts out.  It runs great during normal driving.  Could I be picking up crap from bottom of fuel tank.  It is 34 yrs, old??

Cliff Ruggles:
If it idles good and drives good, then the problem is fuel delivery related.  Could be crap in the fuel system, pump not up to par, pick-up in the tank clogged up, etc.

Any way to rig it up to check fuel pressure on a hard run?......Cliff

Tstates:
Well I re-plumbed the fuel line from the fuel pump to the carb, and removed the filter and repalced it with an in-line filter.  It ran perfect so far, let's see if that solves the problem.  If it comes back I will rig a fuel tank under hood and try to isolate the problem.  BTW,  the rebuild kit, and doing the various mods in your book has  turned this car into quite a beast for a relatively stock engine. ;D

von:
Years ago I had a problem somewhat similar to yours that ended up being the fuel pickup sock in the tank getting clogged with debris. The car was only 3 years old. It would almost kill the engine on uphill grades or WOT, but after sitting with engine off about 15 minutes run normally for a while. Removing the sock and installing an in-line filter cured it.

geberhard:
Is it  a Rochester Quadrajet?  any issues with the choke on the secondary?

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