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Chevrolet Express
Platform: GMT Van

No signal to fuel pump relay

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Old October 24th, 2014, 1:25 AM
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Default No signal to fuel pump relay… injector not firing possibly as well

I have a 1997 G series van conversion with a 5.7 L engine. Fuel pump is good because I checked it by jumping the terminals. It's getting spark. Even tried jumping the fuel pump while cranking the engine and it STILL didn't fire.

Had my father cycle the key so I could check to see if there's a signal being sent to the relay and got nothing. I'm wondering If the injector is firing inside the intake and if there is a way to check it. Which fuse is for the injector? Possible bad ECU? Rural gauge is all the way over past the "F" mark. Any help on where to start is greatly appreciated as we need this running before mid November. We are going on a trip through the Rockies

FYI - my father complained about it running ****ty before it completely stop running. I hope this will provide a clue as to what it could be.

Last edited by rynmcdonald; October 24th, 2014 at 1:30 AM. Reason: Additional information
Old October 24th, 2014, 10:56 AM
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I think the fuse in in the block by the master cylinder.
Change your fuel filter also..
Old October 25th, 2014, 3:17 AM
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Default ECU bad.

It has corrosion damage from water. What other ECUs will work with this van? Can I use one from a truck with the same size engine? Need to know ASAP. Thank you.
Old October 25th, 2014, 1:55 PM
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The aluminum housing of the computer gets like that but doesn't mean the cpu is bad.....
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