Fuel pump not working - Ranger-Forums - The Ultimate Ford Ranger Resource


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  #1  
Old 09-06-2012
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Fuel pump not working

I have replaced the fuel pump, fuel filter, and the relay. I am lost...

if anyone has any ideas please help
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Old 09-06-2012
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Did you hook everything up correctly? A little more info would help.
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Old 09-06-2012
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Im not sure how I could have hooked anything up incorrectly. The pump is a pigtail that only connects one way and the relay only fits one way as well.

I was just driving one day, i put gas in it and went to drive off from the pump and it wouldnt crank. I tested the coil Packs and am getting fire. I can spray starting fluid in the air filter and it will run (until the the fluid burns off, about 1-2 secs).

So I then started looking at fuel related issues. I pulled the fuel hose off of the inlet side of the filter and was not pumping fuel. I changed the relay, (and the filter for good measure) and still got nothing. I just changed the fuel pump today and it is acting the same way... dead

it is a 4 cylinder 1996 model XLT
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Old 09-06-2012
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Could be a bad pump. Where did you get it and what brand?
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Old 09-06-2012
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airtek Advanced Auto Parts.

I can put 12V to the pump and it will turn on... but in the truck... nothing
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Old 09-06-2012
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Have you checked fuse # 12 in the PDB? If it’s good, go to the inertia switch and check for power (12v) at terminal # 2 (Pink with Black stripe wire). If no power, try resetting inertia switch. If power is present, check fuel pump electrical connector (Pink with black stripe wire) for power. If power is present, try jumping the Black wire at the pump electrical connector to a good ground.
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Old 09-07-2012
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is there another PDB besides the driver side dash? if not then yes I just check #12 fuse and its ok. switched it out anyway with a spare to be sure.

on my pigtail for my pump I have a yellow (sending unit) a Red and a Black (pump) and a black with a yellow (might be a faded green) wire. Im assuming thats the ground I guess I could cut that and ground it straight to the frame to check for operation. and if it doesnt make a difference, just splice it back together.

Is that what you are suggesting Rev?
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Old 09-07-2012
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sorry the "red" is actually Pink/Black I just checked the power at the inertia switch and Im not getting power. 3V was the most I read but mostly it was only mV.

Tried the ground idea at the pump to no avail.

Now...why wouldnt I be getting power to the inertia switch? that sounds like a fuse or a relay to me. I can feel the relays cycling on and off when the key is turned on and off
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Old 09-07-2012
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Quote:
Originally Posted by EndangeredRanger View Post
sorry the "red" is actually Pink/Black I just checked the power at the inertia switch and Im not getting power. 3V was the most I read but mostly it was only mV.

Tried the ground idea at the pump to no avail.

Now...why wouldnt I be getting power to the inertia switch? that sounds like a fuse or a relay to me. I can feel the relays cycling on and off when the key is turned on and off
They're known for acting up sometimes.

Smack it. Hard-ish.
Hit the red "reset" button on the top of it.
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Old 09-07-2012
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Quote:
Originally Posted by EndangeredRanger View Post
is there another PDB besides the driver side dash? if not then yes I just check #12 fuse and its ok. switched it out anyway with a spare to be sure.
Yes, there is another fuse/relay box under hood. Its located on the drivers side by the brake reservoir/Master Cylinder. It contains the fuel pump relay and fuse # 12.

For a pictorial view of the PDB click this link Owners Manual and go to Servicing your Ranger and look on page 263 & 314

Quote:
Originally Posted by EndangeredRanger View Post
sorry the "red" is actually Pink/Black I just checked the power at the inertia switch and Im not getting power. 3V was the most I read but mostly it was only mV.
Unplug the wiring connector at the inertia switch. With the key on, check for power at the Dark Green with Yellow stripe wire. If should read 12V. If you have power, reconnect the connector to the inertia switch. Back probe the Pink with black stripe wire. It should read 12V. If not, try the re-set button on the switch. If you still do not have power at the Pink with Black stripe wire, replace the inertia switch.

Last edited by Rev; 09-07-2012 at 09:05 PM.
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Old 09-08-2012
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BOOM!

turns out it was a bad sending unit. I was getting 12V to the inertia switch and to the connector at the pump but I wasn't getting anything at the pump itself.

Thank you so much for your help, sometimes it helps to just bounce off ideas to people.
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  #12  
Old 04-17-2015
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Help Needed!

How exactly did you fix the problem?

I am going through the same issue. Same exact thing happend to my ranger.
Ran outa gas in my front lawn. Put gas in it. And now fuel pump is not pumping gas.

Any suggestions??
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