Back fire and poping
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Fleet Owner
Joined: May 2009
Posts: 21,437
Likes: 76
From: Gilbert, PA
Back fire and poping
Just installed a new 4150 Holly street avenger carb on 79 400M. I got the floats adjusted but i am still getting a back fire/ pop thru the carb. I can usually set up a carb pretty good but i am far from an expert. Any ideas?
O and it replaced a POS edelbrock which dumped so much fuel in it was flooding the engine. Think i should clean the plugs and give it another go?
O and it replaced a POS edelbrock which dumped so much fuel in it was flooding the engine. Think i should clean the plugs and give it another go?
Senior User
Joined: Feb 2005
Posts: 185
Likes: 0
From: South Dakota
Im having the same issue as you but my carb is a motorcraft two barrel, i dont know cause with mine i think it might be a float issue cause once its fully closed it idles smoothly but i dont know....
Junior User
Joined: Jul 2010
Posts: 70
Likes: 0
I am having the same issue. 400 2brl. I can only advance the timing to 6btdc. The truck has been sitting for 7 years, but after a few precautionary measures it fired right up. It was running fine and then one morning after sitting for 2 days I started backfiring and popping. Plugs were new, changed distributor, rotor and wires and still does it.
My apologies in advance if this is considered hijacking a thread. If so I will start a new thread.
Thanks,
Jon
My apologies in advance if this is considered hijacking a thread. If so I will start a new thread.
Thanks,
Jon
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