Q jet Bog

Perfromance and Technical discussions about C3 Corvettes
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greggome
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Joined: Aug 26th, 2014 9:44 pm
Tell us about your Corvette: 1968 327/350 just out of 20 years storage. starting the process of restoring what I can (not frame off).

Q jet Bog

Post by greggome » Apr 10th, 2018 6:35 pm

Had my Q jet rebuilt by allstate carburetor about 6 months ago and its been working fine. I suddenly started having significant hesitation issues when i stomp the accelerator pedal. Car cruises okay though I have noticed a very slight hesitation feel when changing gears and press accelerator normally. Under heavy acceleration the car bogs and almost sounds like it could stall but as soon as I back off the pedal it resumes cruising. just recently installed AC Delco R 45 plugs instead of the cooler Champion RJ12YC plugs I had been running (local driving cooler champion plugs were too rich , new plugs nice tan color). Also I had just flushed cooling system. Dont think these things would cause the bog. Any thoughts how to trouble shoot this?