390 Carb choice
Thread Starter
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Junior User
Joined: Jan 2004
Posts: 62
Likes: 0
From: Bozeman, Montana
After I nail the gas and it starts to wind up it will backfire, one other thing, a guy I work with came and admired my work and told me that I should rip off the EGR valve and put a plate over it and take and plug the valve in the manifold. Well I just plugged them off and the truck seems to run like crap wont idle severe hesitation and I checked the timing and reset it and checked the vacuum and it is barely 15"Hg <--- Checked by pulling the brake booster line and attaching my guage there, is that right? One last thing I live in Montana where there is no emission controls so anything goes.
Thread Starter
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Junior User
Joined: Jan 2004
Posts: 62
Likes: 0
From: Bozeman, Montana
It feels as though the backfire is in the carb and I removed the EGR valve and fabricated an 1/8" steel plate to go where the valve bolted up. One other thing, the engine was reman. probably 8k ago and I cant seem to keep it in time I always set it at 12 degrees BTDC and after I rod it a little bit it will end up at about 2 to 6 degrees <---- Worn out distributor or chain <--- Both?
