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i have a 1980 F350 4x4 with a 460. the previous owner put 3 aftermarket electric fuel pumps in the line, and still kept the manual fuel pump. each electric pump has a on/off toggle switch. drove the truck for about 3 months, then let it sit for about another 4 months. when i went to start it again, it wasnt getting fuel. i have a full tank of gas, but i dont even feel any pressure coming from the lines. i dont know what to do, and i cant figure out why it isnt getting any fuel. does anyone have any ideas of what it could be? thank y'all in advance!!!!
-Todd
Can you hear the electronic fuel pump make noise when someone is cranking it over? Could be there is a pin hole in the line and it's syphoning back to the tank and wont prime itself. Eirher in the metal parts or dry rot on the rubber lines. If the previous owner changed the lines it could be due to not using a fuel line and the center of the line swelled up blocking the line. also check your connects for voltage and to see if they are connected and any splices are not comming apart or showing wear somewhere from rubbing the frame.If the manual fuel pump is still in the line try bypassing it with a piece of rubber fuel line
i can hear all 3 electric fuel pumps going, and i pulled off the line around the center of the truck at the middle fuel pump, and the fuel line is dry. so it seems like it is clogged or something by the tank or in the beginning of the line. and i really dont want to pull out the tank with 30 gallons of fuel in it!!
thanks.
why on earth would he put 3 aftermarket electric pumps on there unless it was having trouble sucking gas.
i think stock would only have been the single mechanical one.
definitely sounds like you have a clog.
Try getting to the line somewhere as close to the tank as possible... work your way back, and see if you can get gas to come out. hopefully, the clog is in the line somewhere.
i have NO idea how you'd drain that gas tank without puncturing. well, i guess you could siphon most of it out unless there's baffles inside preventing a hose going in the fill neck.
Try putting the suction line from the tank on the engine feed side of the first pump coming out of the tank.Put a piece of tubing on the now empty suction side. Take the new unused feed line.Put it a 5 gal can of gas and back feed the line to see if you can clear the clog. I am still trying to figure out why there is 3 electronic pumps myself, unless the tank is full of junk in the first place. If thats the case then replace it or flush it when the tank gets dry.I installed a large canister filter on my buddies F-350 460 dump truck. I straped it to the frame so it feeds right out of the tank into the filter to insure a longer life on the pump.
I thought that 460's weren't available in '80, '81, & '82. Is that an engine swap? My '83 460 has an electric pump in the tank and no mechanical pump. I think it's probably a lot easier to lift off the bed than to drop a tank--at least that's been my experience, plus its a more convenient to troubleshoot fuel problems when you can get to all the tank connections.
the 460 was of course aftermarket. and the tanks were already cleared out before i bought it a year ago. i have used the electric pumps before if i ran out of fuel or something, and i will turn one pump on when i get on the freeway, but i have never had this problem before. it ran fine when i parked it, and 3 months later it died????
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