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Re: 86 f-150 4.9 Backfires?
The truck has a different front clip on it because it has the eng. as
being a 302.And it doesn't have a juice can anywhere on it.I believe the
truck must have struck something in the front,so there is no telling
what parts are missing.I've had the truck about 6 yrs.I thought I had
the problem solved by installing the new air pump,until I got on the
interstate with it.You gave me a lot of good info.I guess I need a
factory manual.I may take the manifold off and see if ther's a leak
somewhere.I took the vent hose off the carb. and it's wet with gas.it
has a check valve on it and another valve 1 line going to canister and
the other one to the antibackfire valve.Thanks for the info.!
Bobby
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