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Old 02-08-2024, 04:26 PM   #1
chevrolet
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Default Q-jet problem

Have an 85 chevy 1 ton pickup with 454 and the q jet runs good but,,, it's always ben rich on idle .It will drive you out of the shop. Had the truck since new just never messed with it because dont know enough about them as far as rejecting them plus it runs good with it. Any one know of someplace I could get help with this thing. Its all stock.Ive rebuilt it a couple of times and done the little things I do know.Thanks Much...DR.
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Old 02-09-2024, 12:27 PM   #2
corky
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Default Re: Q-jet problem

Find an old carb man and have the chock checked.
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Old 02-10-2024, 09:26 PM   #3
Mark Yacavone
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Default Re: Q-jet problem

You removed the idle mixture screw seals, right?
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Old 02-11-2024, 06:12 AM   #4
Terry Cain
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Default Re: Q-jet problem

fuel leaking out jet well plugs.
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Old 02-11-2024, 02:23 PM   #5
Mark Yacavone
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Default Re: Q-jet problem

Quote:
Originally Posted by Terry Cain View Post
fuel leaking out jet well plugs.
That stopped in the late 60's with a different process to install and seal the plugs.
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Old 02-24-2024, 12:11 PM   #6
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Default Re: Q-jet problem

Mark is correct about the base plugs. The later Rochester Q-Jets don’t leak. Try leaning with it with the mixture screws. Also check for a “sunk” float.
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