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1972 f-100


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burlee
New User

Jan 15, 2011, 7:55 PM

Post #1 of 3 (1316 views)
1972 f-100 Sign In

have a 1972 ford f-100 302 v8 it has been running very rough, i have place new distr, points, cond, coil, and it will start idle for about ten minutes die and then will not start. it will try to start then back fire through the carb. i lost on what to do. any help would be great thank you


Loren Champlain Sr
Veteran / Moderator
Loren Champlain Sr profile image

Jan 17, 2011, 6:42 PM

Post #2 of 3 (1294 views)
Re: 1972 f-100 Sign In

burlee; Sounds as though the choke may be masking a vacuum leak? When the engine is cold, the choke is partially closed, causing a rich condition. As the engine warms, the choke opens. If you have a vacuum leak, it creates a lean condition which will cause a backfire. Check all vacuum connections. Check the EGR valve (could be stuck open via carbon?) Make sure your point dwell is 30 degrees and timing set to specs.
Loren
SW Washington


burlee
New User

Jan 18, 2011, 9:35 AM

Post #3 of 3 (1287 views)
Re: 1972 f-100 Sign In

thank you for the information i'll give it a go and let you know how it turns out thanks again






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