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Hey, what are the symptoms of a failing fuel pump relay? We've replaced the fuel filter, the fuel pump and currently tearing down the carb and rebuilding it. Wondering if a bad fuel pump relay could be at the root of our problems? Thanks!

what i no is it should stop the fuel pump afta a few seconds of being on, or u might feel a click from the relay when it turns on and off maybe some help for ur

They usually are a working or not sort of thing. When the relay is not working, you might get it to fire up for a bit, as there is a bypass to run the fuel pump while the key is at start, but it will die soon after starting up. (after you let the key go to run instead of start) The pump will run while you are cranking it over, then stop once you let up from start. It will get some fuel into the bowl of the carb, so the truck will run for a little while until that runs out. I think I was able to let it idle for somewhere between 1-2 minutes on what gas was in a full carb bowl.

I guess my question is what symptoms are you getting? Bad points can mimick the symptoms of low fuel flow like dying off at sustained higher RPMs.

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95 Isuzu Trooper Daily Driver
86 Isuzu Trooper reliable backup
77 LUV 2wd stock beltway blaster (resting)
79 4x4 LUV project: 2.6L, 5spd, 31s (eventually)

MEPR: Man, my 4x4 makes all other LUVs look good

My relay went bad but you could drive the truck about 8 miles and then it would die. You could then crank and eventually restart the truck and go about 200 yards before it died again. It would do this until I parked it and let it cool off. I could then drive another 8 miles before it started all over again. I tore my hair out trying to figure it out. I finally took the relays from my other truck after it was totalled and it's been fine since!

probably the most obvious on my truck was the alternator lite coming on. Only 1 truck did this other one just did what everyone elses did, Couldn't get relay so used universal from auto zone. Search my name for wiring.

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1980 Luv 4X4
another 1980 luv 4x4