85 Ranger...Fuel Pump? Please help.
New User
Joined: May 2000
Posts: 19
Likes: 0
85 Ranger...Fuel Pump? Please help.
I recently purchased an 85 Ranger. It has been sitting for a year. Would not start. I drained fuel (which smelled bad) and replaced with new. The only way it will fire is if you squirt fuel into the throttle body. Here is what I have done...
1. Disconnected lines at various places. Fuel will flow out from gravity.
2. Tried listening for fuel pump in tank..did not hear anything.
3. Tried turning key to see if fuel would "pump" out of line (in between tank and filter) while engine was being turned over. It would not.
4. Replaces relay. No difference.
The manual says to check the fuse and relay to see if in tank pump is getting power, but the fuse diagram does not show which fuse goes to the pump. I looked at all fuses in panel, they all seem o.k.. Is there an in line fuse somewhere?
Does it sound like the in tank pump needs to be replaced? Is that a normal problem for a truck that has ben sitting for a long time? Anything else I should try first? How hard of a job will this be for a very novice do it yourselfer? Aftre I solve this problem, what are other things I should do since the truck has been sitting for so long?
Thanks for your help.
1. Disconnected lines at various places. Fuel will flow out from gravity.
2. Tried listening for fuel pump in tank..did not hear anything.
3. Tried turning key to see if fuel would "pump" out of line (in between tank and filter) while engine was being turned over. It would not.
4. Replaces relay. No difference.
The manual says to check the fuse and relay to see if in tank pump is getting power, but the fuse diagram does not show which fuse goes to the pump. I looked at all fuses in panel, they all seem o.k.. Is there an in line fuse somewhere?
Does it sound like the in tank pump needs to be replaced? Is that a normal problem for a truck that has ben sitting for a long time? Anything else I should try first? How hard of a job will this be for a very novice do it yourselfer? Aftre I solve this problem, what are other things I should do since the truck has been sitting for so long?
Thanks for your help.
Posting Guru
Joined: Jun 1999
Posts: 1,525
Likes: 1
85 Ranger...Fuel Pump? Please help.
For the fuse, study the fuse label very closely for an abbreviation such as FPMP(fuel pump), EFI (fuel injection) and simular. The fuel pump fuse could be shared by the PCM fuse as well. Verify all fuses are good with an ohmmeter checking for continuity after removing the fuse. Then check for voltage at the last pigtail before the harness enters the tank. You will have 2 voltage sources back there, 1 for the fuel level & 1 for the fuel pump. If all good back there,and, you can determine which wires are for the fuel pump power as well as ground, you can momentarily reverse the polarity going to the fuel pump(with jumper wires) in an attempt to make the fuel pump run backwards which usually frees up a stuck fuel pump. However, if you are not sure that the fuel pump ground wire goes all the way to the fuel pump (some grounds are attached to the sender assy,be careful),do not reverse the polarity unless you have removed the fuel pump from the tank.
Phillip
Phillip
New User
Joined: Jun 2000
Posts: 2
Likes: 0
85 Ranger...Fuel Pump? Please help.
don't know if you fixed your problem yet, but i would try looking at the fuel pump inertia switch located just to the right of the transmission hump. If the truck was hit while being parked, or even corrosion on the pigtail, it will cause this problem. Let me know how you make out.
