Fuel pump
04-21-2012, 04:44 PM
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Fuel pump
where is the fuel pump relay on a 93 150 4x4 4.9 I have no power to my pump?
04-21-2012, 05:10 PM
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This is a 95 but the fuel pump relay is in the same position on your 93.
04-21-2012, 10:25 PM
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It was blown I changed it fuel pump runs but theres no fuel at the rail?
04-22-2012, 09:06 AM
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The check fuse "O".
Image below:
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04-22-2012, 01:44 PM
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Thats the fuse I changed and it made the pump work
04-22-2012, 01:56 PM
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are both pumps working? there's a low pressure pump in the tank and a high pressure pump on the inside frame rail on driver's side
04-22-2012, 03:08 PM
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I took the fuel lines off the sending unit I can here the fuel pump running and it wont pump out. And I can blow threw the lines on the sending unit
04-22-2012, 03:25 PM
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I dough that the pump is running.
I think it is just locked up , humming and drawing way too much power. That is why the fuse and relay were bad. It may also have hurt the selector switch on the dash and/or the Inertia switch.
Replace the pump.
04-22-2012, 03:36 PM
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Ive changed the pump 4 times all used pumps but they worked great when I pulled them
04-22-2012, 04:37 PM
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I hooked jumper cables to the sending unit it pumps fuel ? The truck not sending enough power to fuel pump??? Im lost
04-22-2012, 05:26 PM
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The pump unit in the other tank must be bad then. You are pumping into the other tank.
04-22-2012, 05:40 PM
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Single tank truck? Im really lost it seems as if the truck runs pump but it cant pick up the fuel but jumping the pump it does?
04-22-2012, 06:06 PM
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Check to see if the relay is the same as one near by and swap it to see if that makes a difference
04-22-2012, 06:21 PM
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Quote:
Originally Posted by
DRRXR
Check to see if the relay is the same as one near by and swap it to see if that makes a difference
I swapped the relay no diff. I hot wired it to my fuse box it works fine but id rather have it right??
04-22-2012, 06:37 PM
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Maybe you have a weak voltage being applied to the relay coil or the main ckt of the relay.
Best wag---Or you have a short in the pwr to the relay or from the relay.