87 electric fuel pump ?

[mfencl]

I got an 87 chevy v20 4wd with 350 throttle body in it. I think the fuel pump or something is bad I turn the key and it'll kick on like it wants to build pressure then sounds like its let's fuel come back to it I can hear like a water fall of fuel coming back into tank. I turnes the ignition off and turned it back nothin pump didn't turn on nor the did the fasten seat belt light on the dash. usually when pump does turn on it happens when there's the buzzin noise for the seat belt and the fasten seat belt light comes on any one know what's the cause of this ?
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[rs72z]

The rubber hose that connects the fuelpump to the pickup is rotten and letting the fuel run back into the tank. The crappy fuel we have now will it eat up the old hose.

[Desert1957]

Originally Posted by rs72z

The rubber hose that connects the fuelpump to the pickup is rotten and letting the fuel run back into the tank. The crappy fuel we have now will it eat up the old hose.

Are you sure they are rubber? my hoses on my 87 are all braided at the frame rail. I guess the sending unit hoses have to be rubber. makes me want to check mine.

Desert

[rs72z]

Positive. Only the ones inside the tank. I had to replace them on my 87 when i bought it back for the second time.
Do yourself a favor when you drop the tank go ahead and replace the pump or you will be doing it again soon! Don't ask me how i know.

[rs72z]

Just to make sure we are on the same page. Its inside the tank where the pump attaches to the pickup tube.

[mfencl]

yeahh ill have to check tha this weekend thanks big help
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[mfencl]

another question.. on dropping the tank how do I disconect the lines on top of sending unit? the bed n cab r so close together? n I really don't wanna take the bed loose
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[rs72z]

Unbolt the tank brackets from inside of the frame, 4 bolts on each bracket. Then drop the tank down far enough to reach up on top of it to unhook the lines. The drivers side has plenty of slack, the passengers is a different story.
Best if the tank is pretty much empty.

[mfencl]

well ill have to do that when I get back I did a light check on a pink coming from the tank to the fuse I made surfe my ground was good and went to test it n the light was very dim what's that meen
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[mfencl]

ill have todo that when I get back I checked a pink redish wire coming from the tank to the fuse box I checked it with a test light and it was really dim light meening low power could that cause the fuel pump to do what its doin? and its a one tank truck and do you know where the pump relay is located
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[rs72z]

On the firewall on the right side.

[mfencl]

well I traced my wires from the tank to the fire wall no relay it goes straight to fuse box n I loose it there I can't see where goes from there cuz there ain't a fuse that has todo with fuel on the fuse box
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