weird fuel issue i can't figure out.

clutchdust

Millionaire Playboy
Joined
Mar 27, 2008
Messages
1,726
Location
In transition
this is on one of my project cars, but an engine is an engine, right?
so here's how it's laid out. i have one of those clear glass strainers just before my electric fuel pump (just to keep out the big trash), then it goes into my fuel pump. from there it goes through a real fuel filter, then a pressure regulator and out to the carb.
now what seems to happen is when i drive the car for 5-10 minutes, it will just suddenly lose the prime on the fuel pump. the pump is thumping like mad but i just don't get any fuel through it. i've had this happen several times and gone through various issues. i don't have a leak before the pump and i'm not pulling air and everything is tight.
what i found last night when it did it to me is that as soon as i tweek the regulator, all of a sudden it picks up the prime. this is a *new* regulator, i've had it for about 2 years but i just put it in the fuel system a couple months ago. i just can't figure out how a fuel pressure regulator would cause the pump to lose its prime.
any thoughts?
 
IMO, this the same or damn similar problem that Wade/Black Rat has been fighting....I think he trying a rear mounted pusher fuel pump...CARTER being among the best....or WAS years ago, anyway....

I dunno why, but that move has permanetly fixed a old Pontiac of mine years ago, and whenever needing a fuel pump since then, rear electric has been my solution, carb or FI.....

the fuel line is under some pressure going forward, not suction, to therefore the fuel can do what it damn well feels like to goes to the carb and burbles out the inlet valves....so what?? fuel follows quick enough....

with FI at ~40 lbs.....methinks we can take a torch to outside steel of the line and not kill the engine.....:pprrtt:
 
Back
Top