1987 Ford Bronco II Can't get Fuel

[alwaysFlOoReD]

Disconnect the power at the frame rail pump and supply 12 volts to it. This is to check if its working.

 

[johndough]

Disconnect the power at the frame rail pump and supply 12 volts to it. This is to check if its working.

yes i’m getting 12v

 

[rusty ol ranger]

yes i’m getting 12v

So the pump is running?

If the rail pump is running, and youre still not getting pressure you have a dead tank pump, a massive blockage or massive leak.

 

[alwaysFlOoReD]

yes i’m getting 12v

Not check for 12 volts...
SUPPLY 12volts to the pump and see if it runs.

 

[johndough]

Not check for 12 volts...
SUPPLY 12volts to the pump and see if it runs.

it’s running… just dropped the tank and poured some of the gas out and i’m going to assume this is the 10yr old gas and it could be my problem

 

[ecgreen]

it’s running… just dropped the tank and poured some of the gas out and i’m going to assume this is the 10yr old gas and it could be my problem

I though it was coffee lmao!

 

[Paulos]

When you bypassed the fuel reservoir, you did connect the two smaller hoses and the two larger hoses, right? Just checking, because the supply and return lines switch positions when they exit the reservoir. Swapping the lines would create the problem you have.
Also, if you try to force open a reservoir that was not designed for a filter it could break it. I have heard that the two parts of filter-less reservoirs are glued together.
IMHO, I would leave the reservoir connected. Unless the low pressure pump in the tank is only needed for priming the system in your new configuration, it may not be able to keep up with the volume of the high pressure pump.

 

[rusty ol ranger]

When you bypassed the fuel reservoir, you did connect the two smaller hoses and the two larger hoses, right? Just checking, because the supply and return lines switch positions when they exit the reservoir. Swapping the lines would create the problem you have.
Also, if you try to force open a reservoir that was not designed for a filter it could break it. I have heard that the two parts of filter-less reservoirs are glued together.
IMHO, I would leave the reservoir connected. Unless the low pressure pump in the tank is only needed for priming the system in your new configuration, it may not be able to keep up with the volume of the high pressure pump.View attachment 69675

Mine did not have a filter in it and spun apart just fine. Maybe its supposed to have one???

 

[Paulos]

Mine did not have a filter in it and spun apart just fine. Maybe its supposed to have one???

I replaced mine a few years ago with the one in the picture I posted. Those are definitely sealed shut. I don't recall where I read about some with and without filters. TRS I think. I got tired of issues with the oring on my original filtered reservoir (and gas down my arms and in my face when changing filters. Yeah, sometimes I don't fire on all cylinders).

If you've got yours without the filter in it and it doesn't leak, you're doing good.

 

[johndough]

Forgot about that. Yeah, my 88 has one of those between the fuel tank and the high pressure pump and the ”normal” fuel filter up between the high pressure pump and the engine.

if both pumps are kicking on and you have 0 psi at the rail, there’s either a major leak, major blockage, or a pump is failing to pump. If the pumps are not kicking on, you either have a bad pump or a wiring fault. I’ve always started with checking to see if I have 12v at the pump after verifying the fuses are good and swapping the fuel pump relay with a spare I keep on hand. Sometimes I jump the inertia switch. If there’s not 12v at the pumps at that point, there’s probably a bad fuseable link or broken wire somewhere.

both pumps getting 12v. i’ve pulled lines off and blown through them using my air compressor and cleared through them. no blockages. i’ve bypassed the inertia switch. i’m lost at this point . i just went and put new gas in it yesterday after flushing the tank and cleaning it.

 

[johndough]

When you bypassed the fuel reservoir, you did connect the two smaller hoses and the two larger hoses, right? Just checking, because the supply and return lines switch positions when they exit the reservoir. Swapping the lines would create the problem you have.
Also, if you try to force open a reservoir that was not designed for a filter it could break it. I have heard that the two parts of filter-less reservoirs are glued together.
IMHO, I would leave the reservoir connected. Unless the low pressure pump in the tank is only needed for priming the system in your new configuration, it may not be able to keep up with the volume of the high pressure pump.View attachment 69675

i did. they’re connected right. i’m lost at this point.

 

[johndough]

both pumps getting 12v. i’ve pulled lines off and blown through them using my air compressor and cleared through them. no blockages. i’ve bypassed the inertia switch. i’m lost at this point . i just went and put new gas in it yesterday after flushing the tank and cleaning it.

only lines i didn’t pull off and blow through are the ones that go from the frame rail fuel filter up to the regulator, because i’m not sure how to unplug the lines from these connectors. do any of you guys know how?

 

[rumblecloud]

Looks like a quick disconnect similar to your A/C lines. If so your lccal Auto Parts store will/should have a tool to disconnect them. Looks weird, but easy to do.
Here's one that has everything:

AutoWanderer Tool 22PCS Master Quick Disconnect Tool Kit

 

[rusty ol ranger]

only lines i didn’t pull off and blow through are the ones that go from the frame rail fuel filter up to the regulator, because i’m not sure how to unplug the lines from these connectors. do any of you guys know how?

Yep quick disconnect. Insert tool around the hose, push in...should pop loose.

 

[Paulos]

If they haven't been removed for a long time you may have to twist the quick disconnect fittings (male and female sides) to break them loose before they will separate.