problem after upgrades what is this
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Postmaster
Joined: Jun 2003
Posts: 2,656
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From: shepherd
problem after upgrades what is this
i also posted this in the fuel system section. i know the cam is in time and the wires are on correctly. i have timing set at 10 btdc. i put some ported thumper e7 heads on a roller block with the f 303 cam. i have a 4 bbl intake with a 570 street avenger carb which was used and i never tried it until now. the motor only cranks up when i choke it and pump the gas 2 times. then i have to hold the choke almost closed and keep working the gas to keep it going and not really running very great still. it will rev fast and normal if i hold the choke almost closed and then hit it hard but if i try to rev it up without the choke i need to first pump the gas a couple times and then i can rev it fast. it won't idle unless i turn the idle screw realy high and still just idles for maybe 3 seconds. i know i have to get slightly shorter pushrods because i have to use shims and still am getting some sideloading of the valves but i wouldn't think that would cause my problem. does this sound like a bad carb. i do know that i couldn't get the fuel to come out of the front bowl at the site screw even when i turned the jet on top of the bowl. i am using a stock mechanical fuel pump which is new. the back bowl is getting plenty of fuel.
