Mechanics

WONT START NO POWER TO FUEL PUMP?

1993 Jeep YJ

Electrical problem
1993 Jeep YJ 6 cyl Four Wheel Drive Manual 185000 miles

The Jeep has sat in my garage for some time wemnt to start it and it will crank, has spark, but fuel pump is not turning on. Fuel pump worked out of tank. I have tested all wires to fuel pump, nothing. Checked all fuses and relays all okay. I replaced the ECU with a rebuilt one, the old one was badly corroded and still nothing. I have cleaned up and replaced some of the ground wires. This has been really frusterating! Any help would be greatly appreciated. This Jeep is my girl friends baby and she really misses it. Thanks.
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Yjjeep
August 30, 2010.




What we're looking for here is a 2 second pulse of " on" time. Your going to have to run all the same checks on the ASD relay and see if it is acting the same way.
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Wrenchtech
Sep 14, 2010.
Ran the same test on the ASD relay. Relay will pull in and output will light up. However I still have no response when I turn on the key-nothing.

Tiny
Yjjeep
Sep 15, 2010.
I want to verify all the power or ground inputs to make sure they are working. It's starting to look like a bad ECM but I don't want you to buy one without someone else verifying it.

Wrenchtech
Sep 15, 2010.

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