[starskytorino]

1972 chevelle with a gm 350 crate motor all of a sudden little to none fuel in filter replaceed mech pump with new holley 80gph mech pump no change it has a new tank and sending unit but was running fine till a few weeks ago when it started acting like it was running out of fuel so we replaced the pump with the holley but still having the same problem the pump we replaced also looked like the holley pump it came with the engine any ideas would be helpful thank you

 

[Ken Hayes]

Disconnect the line from the tank and fuel pump and see if you can blow air through it with a air gun. Sounds like there is some crap stuck in the line somewhere.

 

[VinceS427bb]

check the hose at the tank for loose fittings and/or cracks in the hose.
this will allow pumps to suck air

 

[starskytorino]

changed fuel pump with factory style , new fuel line to carb, blew out line from tank , new tank, new sending unit, still little fuel in filter just little sqiurts now and then , started adjusting front float and when fuel started coming out of carb vent filter started getting lots of fuel in it turned float back down to stop over flow fuel stopped coming in to filter. also checked the rod that runs the fuel pump arm for wear and mushrooming and it's fine could the cam ecentric be bad without ruining the rod?any help would be great because I'm a ford guy and this driving me nuts thanks

 

[Steve R]

Have you hooked up a fuel pressure gauge? I used to have a camaro that would show little fuel in the filter, it ran fine. The problem could be elsewhere. Trouble the car from scratch, including ignition, grounds, etc. Assume any component is bad, until proven otherwise.

Steve R