My89

OK...Need a little advice


A few weeks ago I found gas leaking out the front tank gas cap. At the time, I was on rear tank. I switched to the front tank and drained some gas off. Ran fine after, now when on front tank the engine will start sputtering like its not getting gas, switch to rear tank it runs fine.


Anyone have any ideas what could be wrong??? If I switch back to front it will run fine for a bit but eventually...I'll have to switch back to rear.


Should I drain front and just use rear? Does both tanks have a fuel pump?
What could be cost to fix?


Thanks

Chris_1

iTrader: (1)

Pump in each tank. Each pump has a check valve. Sounds like it's crossfilling. If it has a failing check valve the rear pump could be pumping gas in to the front tank, which would make it overfill.
A fuel pressure gauge (about $60 or loan a tool) would help narrow things down.
It kinda sounds like you're going to have to replace the front pump I would think.

My89

Is the check valve and pump one unit??? I'm a little dumb when it comes to the dual tank fords???

Just call me Sean

iTrader: (1)

His is an '89, it's different.

Do you use both tanks equally or has the front one been unused for a while? Three fuel pumps, possible the front tank one is weak. Possible the DFR is sticking also, it has the switching device.

My89

What is the dfr and wheres is it located? Could it be the switch ? Although it seems to switch.

Just call me Sean

iTrader: (1)

DFR= dual function reservoir. It's on the frame rail near the frame pump and fuel filter. It's operated by pump pressure, the switch only selects which pump.

My89

Ok DFR would explain why fuel comes out of front tank. Why would it intermittently starve for fuel on the front tank?

Just call me Sean

iTrader: (1)

Because the valve is stuck or the pump doesn't have enough pressure to move it.

My89

OK...Hope someone can help.

Went out to move truck today and will not start....ran fine on front tank last week. Just turns over....

When I turn the key I don't hear either pump....selected front or back. Is it possible that neither pump would work with the problems I've been having?

Just call me Sean

iTrader: (1)

Sounds like a different problem.