Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

Lean At Idle

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autonaut:
Try and find out if it is taking in false air through the baseplate or booster. Use a non lit acetylene torch for the baseplate. Check the booster to by turning off the vehicle and wait 30 secs before pushing the brake pedal.. If the booster is tight, it will still have vacuum to help you press down the pedal. If not, there is a leak somewhere from the line going to the booster or the booster itself.

Also, have you checked to see where the float level is at? If the float level is too low this could be the problem.
Check for fuel delivery. Clogged filter, bad pump, too low pressure.

38932:
Problem solved......When I rebuilt and modified the carb I put the new idle tubes in and did not drill them. For some odd reason I thought they were pre-drilled . I removed the tubes, drilled .038 and problem solved. Engine is very happy now, idles and sounds great.

Cliff Ruggles:
Good news!....Cliff

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