truck stranded, starts every time, won't stay running
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Laughing Gas
Joined: Apr 2004
Posts: 776
Likes: 42
From: STL MO
truck stranded, starts every time, won't stay running
Sorry that this is not for either of my Powerstrokes. It’s for my 88 6.6L diesel f600. I also posted it in the OBS forum to get more inputs. Sorry, I'm pretty desperate.
The truck has been reliably running till now. Suddenly it won’t stay running anymore and got stranded on a farm. The farmer will allow me to leave it there for a few days. It will start every time. As soon as I let the key go back to run position it dies. But, if I hold the key at start position, it will keep running and will even rev up if I step on the accelerate pedal. Based on these observations, I think that I can rule out the most common “air in fuel return line” problem. I took the switch off the truck and took it apart, cleaned all the contact points. I then connected it to the harness and use a small screw driver to manipulate it. Still the same, starts every time and dies. Without a spare ignition switch to test, I can’t be sure that a new switch will fix it and get it home. Before I get a new switch, I want to do some tests to make sure it’s the switch not anything else. However, I can not locate a wiring diagram for the ignition switch anywhere I looked on the internet. My last resort is the public library. I thought that they must have it in the All Data thing, but to my disappointment, they only have information up to 1 ton truck not mid-sized. So, I come here to see if any of you can help me get a wiring diagram, and or offer me you suggestion base on the symptoms and your general diesel knowledge. Thanks in advance and have a great day! Erwin
The truck has been reliably running till now. Suddenly it won’t stay running anymore and got stranded on a farm. The farmer will allow me to leave it there for a few days. It will start every time. As soon as I let the key go back to run position it dies. But, if I hold the key at start position, it will keep running and will even rev up if I step on the accelerate pedal. Based on these observations, I think that I can rule out the most common “air in fuel return line” problem. I took the switch off the truck and took it apart, cleaned all the contact points. I then connected it to the harness and use a small screw driver to manipulate it. Still the same, starts every time and dies. Without a spare ignition switch to test, I can’t be sure that a new switch will fix it and get it home. Before I get a new switch, I want to do some tests to make sure it’s the switch not anything else. However, I can not locate a wiring diagram for the ignition switch anywhere I looked on the internet. My last resort is the public library. I thought that they must have it in the All Data thing, but to my disappointment, they only have information up to 1 ton truck not mid-sized. So, I come here to see if any of you can help me get a wiring diagram, and or offer me you suggestion base on the symptoms and your general diesel knowledge. Thanks in advance and have a great day! Erwin
Ret. UPSer
Joined: Dec 2002
Posts: 581
Likes: 9
From: Morgan Hill Ca
Sounds like the fuel shut off solenoid has 12v when you start it, but when you turn the key to the run position you it dies because you no longer have 12v ...bad switch....
I would run a jumper wire direct from the battery to the fuel shut off solenoid .... you will have to disconnect the jumper wire to kill the engine.
I would run a jumper wire direct from the battery to the fuel shut off solenoid .... you will have to disconnect the jumper wire to kill the engine.
Thread Starter
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Laughing Gas
Joined: Apr 2004
Posts: 776
Likes: 42
From: STL MO
Yes, it's the fuel shut off solenoid. I tied the lever to the engine block with a small rope and got her home. will decide what to do to fix. Might just go back to the good old mechanical cable setup. Thx all for your help. Erwin
Laughing Gas
Joined: Nov 2003
Posts: 898
Likes: 1
From: southeren Oh
I like you cable idea. But beware most voltage regulators need a ignition switch power to make the alt charge the batteries. Just make sure the alt is charging the batteries or you will find out the hard way that it is not.
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