Simple Fuel Pump questions
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Senior User
Joined: Jul 2003
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From: Virginia
Simple Fuel Pump questions
okay, truck is a 93 dakota, i know it is not a ford but u guys can usually help me out. im having fuel issues. im not getting power to the pump. i found one corroded place in the wiring and fixed it and it worked for awhile. now evidently there is somewhere else and i cant find it. i was wondering if their is any reason i couldnt just wire the fuel pump up to a new wire and switch? i didnt know if the pump runs constant or not? maybe the computer tells it when too turn on/off? if i wire it up to a switch it will run constantly and im not sure if it will work that way or not? also when i hook the pump up to jumper cables it runs for like 5 seconds and stops? is something wrong with the pump or does it just get too hot with the heavy amps from jumper cables? any thoughts would be appreciated.
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Joined: Dec 2001
Posts: 22,436
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From: Louisville,Ky.
If you hook power to the pump directly, it should run constantly. Does the fuel rail have a regulator or is it returnless?
I'm not sure on a Dakota. I know a 97 1500 V8 uses a returnless system.
I'm not sure on a Dakota. I know a 97 1500 V8 uses a returnless system.
Thread Starter
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Senior User
Joined: Jul 2003
Posts: 203
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From: Virginia
when i hook it up to a battery it runs about 3 seconds, then stops. i know this isnt right, but i thought maybe i fried the pump by running it with heavy jumper cables. also, my question is can i directly wire the pump to a switch or is the pump not supposed to run constantly? i assume since it has a return line the pump would run all the time? any ideas? tommorow i will get out my tester and see if i have voltage at the pump, but im guessing i dont
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Joined: Dec 2001
Posts: 22,436
Likes: 17
From: Louisville,Ky.
Yes, if it has a return line, then it runs all of the time. If you wire it direct, make sure you power it from a key-on source so that it won't run with the key off. You can add a switch if you want to, but I would still wire it so it only runs with the key on.
