Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor

Stop suddenly - almost dies

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jamesF:
Sometimes. Mainly when still not up to operating temp, but at other times too, my car will idle down WAY low when I stop rather quickly at a stop light. I have hydroboost installed so that's not affecting vacuum.
Would you adjust the FLOAT?

About 500 miles on Carb. Newly rebuilt by Cliff 800 cfm.
9.1-1 455
72 intake
Stock mechanical 70 GTO Fuel Pump
Stock Fuel lines
Runs great otherwise.. Not really a Problem, but I'd like to address it.

Cliff Ruggles:
The only time I've ever experienced this condition was years ago using a Carter high performance mechanical pump.  Once in a while, when stopping really hard, the engine would falter and idle slow for a few seconds, then recover and be OK.

At one point I check the fuel pressure from that pump, and it was nearly 9psi!  I removed it, and went to an electric pump with a regulator, and have enjoyed over 10 years or trouble free driving, street, and nearly into the 10's at the track at over 120mph!......Cliff

jamesF:
That's exactly what it does..So we are talking about a fuel delivery issue then. I'll check my pressure. Thanks

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