383 backfires on passenger header at big end
10-21-2010, 07:02 PM
#1
Junior Member
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Join Date: Sep 2010
Posts: 13
383 backfires on passenger header at big end
after a quick rev with rpm dropping I have a back fire in passenger header I has never done this before timing is good. Could a valve be out of adjustment I have poly locks and a stud girdle
10-21-2010, 09:05 PM
#4
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Join Date: Dec 2004
Location: austin texas
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it could be many things a broke or weak valve spring is what i would check for first if it was running fine before. Also do a leak down on the cylinders to make sure the rings and valves are sealing. That will tell you real quick were the cause is
10-22-2010, 03:22 AM
#6
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I agree with Charlie. Check for header leak. Gets a large shot of fuel when the throttle is closed and when it sucks air past the flange it will ignite in the header. Mine will do it if I don't keep an eye on the bolts.
Curtis
Curtis
10-22-2010, 03:50 PM
#8
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Man, isn't that awesome when it is something that simple??? If it were ME, I would have a spun bearing, wiped cam w/ several busted polly locks & a cracked head... plus a dog peeing on the front wheel too.
10-22-2010, 06:22 PM
#10
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Originally Posted by nutup
It was a simple fix I had a lot of bad thoughts too thats what is great about the forums there is so much knowledge out there and people willing to give advice
