1989 Fuel issues.
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1989 Fuel issues.
Greetings. I have an issue with my f250 7.3L diesel. Before I owned it, it belonged to my dad. The truck ran great before it was parked last Oct/Nov. About 2 weeks ago it was given to me by him and since then its been nothing but trouble. Basically it wont run. I replaced the filter and filled it with Diesel Kleen. Im getting fuel to the filter, fuel to the injection pump but no fuel to the injectors. I've cracked one of the lines to the injector to pass any air through but still no fuel. Is there a chance that the solenoid could be locked in the off position prevention fuel flow ? Ive searched related forms but all I come up with is air in the system and I dont see any plunger on the side of the pump aside from " what looks like " one mechanically operared with the " high idle" solenoid.
The solenoids humm before you try starting it too btw.
This is my first diesel truck. I thought working on my 03 mustang was a B-otch.
Any advise/help would be very appreciated.
The solenoids humm before you try starting it too btw.
This is my first diesel truck. I thought working on my 03 mustang was a B-otch.
Any advise/help would be very appreciated.
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
There are two wires going to the Injection Pump ... Turn the key on and disconnect the forward most connector, touch it back on the terminal, do you hear a click???
That is the FSS (Fuel Shutoff solenoid), if it clicks, the Injection Pump may be bad.
You can try filling it with a Diesel cleaner lubricator and letting it set for a day or so, though I doubt it'll help.
What solenoid hums???
Why was it parked, did it have issues then???
-Enjoy
fh : )_~
That is the FSS (Fuel Shutoff solenoid), if it clicks, the Injection Pump may be bad.
You can try filling it with a Diesel cleaner lubricator and letting it set for a day or so, though I doubt it'll help.
What solenoid hums???
Why was it parked, did it have issues then???
-Enjoy
fh : )_~
Elder User
Joined: Jun 2010
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From: Salisbury NC
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Postmaster
Joined: Jun 2008
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From: Michigan
fuel doesnt gel from age. It gels from cold temperatures.
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There are two wires going to the Injection Pump ... Turn the key on and disconnect the forward most connector, touch it back on the terminal, do you hear a click???
That is the FSS (Fuel Shutoff solenoid), if it clicks, the Injection Pump may be bad.
You can try filling it with a Diesel cleaner lubricator and letting it set for a day or so, though I doubt it'll help.
What solenoid hums???
Why was it parked, did it have issues then???
-Enjoy
fh : )_~
That is the FSS (Fuel Shutoff solenoid), if it clicks, the Injection Pump may be bad.
You can try filling it with a Diesel cleaner lubricator and letting it set for a day or so, though I doubt it'll help.
What solenoid hums???
Why was it parked, did it have issues then???
-Enjoy
fh : )_~
It was parked because my dad was going to give it to my older brother but he bought a newer truck anyway. There was nothing wrong with the truck b4 it was parked.
And another thing, when i turn the key on and disconnect the forward most connector, " towards the firewall " and reconnect it, I dont hear anything because it has no power to it. If I run a 12V power supply to that solenoid, it makes a click noise and it also activates the high idle solenoid.
Postmaster
Joined: Jun 2008
Posts: 2,500
Likes: 2
From: Michigan
I do have 2 solenoids ( I think ), 2 wires. When I power the key on, the wire closest to radiator has power and makes a click noise. The wire closest to the fire wall does not have power to it. I think I read somewhere that both must have power. The 3rd wire is for the high idle solenoid.
It was parked because my dad was going to give it to my older brother but he bought a newer truck anyway. There was nothing wrong with the truck b4 it was parked.
And another thing, when i turn the key on and disconnect the forward most connector, " towards the firewall " and reconnect it, I dont hear anything because it has no power to it. If I run a 12V power supply to that solenoid, it makes a click noise and it also activates the high idle solenoid.
It was parked because my dad was going to give it to my older brother but he bought a newer truck anyway. There was nothing wrong with the truck b4 it was parked.
And another thing, when i turn the key on and disconnect the forward most connector, " towards the firewall " and reconnect it, I dont hear anything because it has no power to it. If I run a 12V power supply to that solenoid, it makes a click noise and it also activates the high idle solenoid.
[/IMG]
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
The FORWARD most connector is the FSS ... That means towards the FRONT of the truck, not closer to the firewall.
References are ALWAY done as setting in the drivers seat.
The rear most connector is the Cold Start Advance and is on the same circuit as the High Idle solenoid, that is why when you applied 12v+ to it the High Idle Solenoid activated.
The Cold Start circuit only has power when the key is on and the water temperature is below 112F. Look under the alternator, down by the thermostat housing you'll see the thermal switch that controls that circuit.
-Enjoy
fh : )_~
References are ALWAY done as setting in the drivers seat.
The rear most connector is the Cold Start Advance and is on the same circuit as the High Idle solenoid, that is why when you applied 12v+ to it the High Idle Solenoid activated.
The Cold Start circuit only has power when the key is on and the water temperature is below 112F. Look under the alternator, down by the thermostat housing you'll see the thermal switch that controls that circuit.
-Enjoy
fh : )_~
Lead Driver
Joined: Mar 2006
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From: western SD
You say that you are getting fuel to the filter but how much? I would do a pressure and flow test. Remove the core from the shrader valve, (looks like a tire valve on the fuel filter). Place a fuel pressure gauge there. You should get 3-5 pounds while cranking if I remember right. If that checks out remove fuel pressure gauge and run a fuel hose there to a container and crank it. You should get 1/3 pint in 10 seconds of cranking. If either of these tests fail you need a lift pump. It looks like a regular fuel pump on a gasser.
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You say that you are getting fuel to the filter but how much? I would do a pressure and flow test. Remove the core from the shrader valve, (looks like a tire valve on the fuel filter). Place a fuel pressure gauge there. You should get 3-5 pounds while cranking if I remember right. If that checks out remove fuel pressure gauge and run a fuel hose there to a container and crank it. You should get 1/3 pint in 10 seconds of cranking. If either of these tests fail you need a lift pump. It looks like a regular fuel pump on a gasser.