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Old 06-02-2002, 07:59 PM
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Post carburetor problem

I have a 1969 Pontiac 350 engine that will not stay running after it warms up and the butterfly is full open. It dies. I have adjusted the fuel/air mixture needle valves and the fast idle screw to no avail. Any help would be appreciated. Thanks. Rocky

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Old 06-03-2002, 05:26 AM
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Sounds like your passeges are clogged up or maybe a vacuum leak. you probably need to tear it down and soak and clean it.hope this helps.
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Old 06-04-2002, 11:41 AM
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If things are clean (try fuel line cleaner/gas treatment? Make shure to check for vacume leaks!
Do this buy running the motor----use a can of carb cleaner----spray around intake and carb base,,vacume hoses etc...If you have a tach hook it up..if not,,listen for the RPMs to go up...
if they do you have a leak! pinpoint the problem
usually a simple fix...If you cant find a leak Check the fuel pump pressure,,,easy..get a vacume/fuel pump gage--cheep---pull the gas line
coming into the carb plug the gage hose on the end
of the tubeing then turn the motor over and note the reading--write it down-- then call the parts guy and tell him what you read--he'll look it up in the book for you,,if its a low reading your pontiac won't idel worth a damn. Now that you have the gas line out of carb Change the fuel filter inside---I bet it will help-- e-mail me if you like
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