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Home » Public Forums » GMCnet » Any warnings or things to do when replacing a mechanical fuel pump? (My carb is flooding out and running rich....)
Any warnings or things to do when replacing a mechanical fuel pump? [message #274827] Thu, 02 April 2015 17:28 Go to previous message
budworks521 is currently offline  budworks521   United States
Messages: 137
Registered: October 2013
Location: Grand Rapids MI 1974 Pain...
Karma:
Senior Member
I have tried numerous things to get the 455 running right. My carb has been totally rebuilt and I can get proper vaccuum when idling for 15 minutes or so then it just bogs out and the vac steadily decreases. I have tried timing, idle screws, vapor cannister, etc and still can't figure out my issue. I don't believe the float is damaged or the accelator pump is damaged. I experienced this flooding before the carb was rebuilt as well. Does anyone have any ideas what could increase the fuel pressure to the carb??? What about a damaged fuel line sucking air??? Anybody have any ideas. Thanks, btw this is pushing two years of an upper half rebuild. Fun.

1974 Painted Desert 455 upper half rebuild constant project inexperienced mechanic Grand Rapids Mi Always trying to learn
 
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