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Old 04-19-2005, 12:43 AM   #1
dyingdeadman
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I am stumped, need help

ok heres the problem, my truck stumbles while accelerating, pops through the carb untill it warms up and desiels really bad after being turned off.(sometimes up to 2, 3 mins) its a 72 gmc with a 402, hei and 750 manual choke eldebrock carb.

i have tried to adjust the timing and the carb. several times and several differnt ways. same problem. also i have checked for vacuum leaks but cant find any. all the vacuum lines are new. the carb has been rebuild, new plugs and wires put in like 3 months ago. dont know what else to look for or do. please help. its my daily driver.
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Old 04-19-2005, 01:50 AM   #2
VetteVet
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carb problems

here's one thread that talks about your problem. There are several others. If you type backfire in the search box they will come up.
VetteVet

http://67-72chevytrucks.com/vboard/s...light=backfire
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Old 04-19-2005, 02:00 AM   #3
dyingdeadman
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thank you, gives me a few ideas on things to check.
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