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7.3L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

       
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Old 04-02-2006, 08:31 PM   #1 (permalink)
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Won't shut off when key is turned off

Hi

Just got the truck home, turn key off, dash turns off but motor keeps running. Pulled battery cables, no change.

Help!
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Old 04-02-2006, 08:50 PM   #2 (permalink)
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Re: Won't shut off when key is turned off

If its still running, go out and unhook the wire on top of your pump on the drivers side that is closest to you (the wire on the driver side of the pump farthest towards the front of the engine.) that'll shut it off...sounds like you have a short...Sounds like a weekend of wire tracing is on your horizon.

Shawn
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Old 04-02-2006, 08:55 PM   #3 (permalink)
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Re: Won't shut off when key is turned off

You need to give us info on your truck, basically year, model, drivetrain info and anything else which you think is important for us to know.
The fuel shut-off solenoids power should be cut-off when the ignition is turned off. The FSS gets it's power from the glow plug relay. It is a red/light green wire. The solenoid appears to be stuck in the open position, or someone did some messing around with some wiring. Try tapping on the solenoid to see if it helps. I don't know if the solenoid itself is serviceable, or if the injection pump must be replaced. Tim
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Old 04-02-2006, 09:00 PM   #4 (permalink)
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Re: Won't shut off when key is turned off

Sorry, just a desparate moment. 94 F250 7.3 IDI
I dont see a wire to the top of the pump.
This truck is brand new to me, just picked it up. Trouble already [img]/ubbthreads/images/graemlins/frown.gif[/img]
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Old 04-02-2006, 09:21 PM   #5 (permalink)
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Re: Won't shut off when key is turned off

Saw such a problem on my CD the other day, can't find it now. visit my gallery below and search for IP pics. The wire is the front drivers side of the injection pump (one with all the lines) center front of the engine.

As you said you disconnected the battery(s) disconnect negative cables on both batteries. If it is standard try and stall the engine, if auto you will have to squeeze the rubber return line hose from the IP to #2 injector until it stalls.
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Old 04-02-2006, 09:41 PM   #6 (permalink)
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Re: Won't shut off when key is turned off

Follow the fuel line from the filter to the FSS (fuel shutdown solenoid) tap with a handle of a screw driver.
Look close it has 1 wire to the coil of the solenoid, the other side of the coil goes to ground. Check with a test light, with key off there should be no test light.
With key ON, the test light will illuminate.
If the key is on, and you have an illuminated test light, you problem is electrical.
If you have NO test light the problem is mechanical, solenoid is stuck open.
Vice grip on the rubber hose, as it leaves the lift pump will kill the engine.
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Old 04-02-2006, 09:46 PM   #7 (permalink)
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Re: Won't shut off when key is turned off

I just cant find anything,. going by flashlight in the rain
Anywhere near Shakopee Bob?
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Old 04-02-2006, 09:57 PM   #8 (permalink)
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Re: Won't shut off when key is turned off

Is the filter on the upper left side of the motor?
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Old 04-02-2006, 09:57 PM   #9 (permalink)
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Re: Won't shut off when key is turned off

Eagan, but it raining cat & dogs, and my mom says its my bed time.
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Old 04-02-2006, 10:00 PM   #10 (permalink)
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Re: Won't shut off when key is turned off

When seated behind the wheel, it is to the right side,
just follow the stainless steel line from the fuel filter to the top of the Injection Pump, as it goes to the IP is where you will find the FSS.
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Old 04-02-2006, 10:01 PM   #11 (permalink)
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Re: Won't shut off when key is turned off

[ QUOTE ]
Eagan, but it raining cat & dogs, and my mom says its my bed time.

[/ QUOTE ]

Can you call me? 763 229 8735

I cant figure this thing out.
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Old 04-02-2006, 10:10 PM   #12 (permalink)
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Re: Won't shut off when key is turned off

I tried calling but no answer,
Here is another suggestion,
Remove the air cleaner,
get a piece of plastic bag, 12" x 12", and snuff the engine by restricting the air intake, choke the bit**.
Don't let anything get sucked in, and don't use a towel soaked with anything petrol.
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Old 04-02-2006, 10:37 PM   #13 (permalink)
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Re: Won't shut off when key is turned off

[ QUOTE ]
I tried calling but no answer,
Here is another suggestion,
Remove the air cleaner,
get a piece of plastic bag, 12" x 12", and snuff the engine by restricting the air intake, choke the bit**.
Don't let anything get sucked in, and don't use a towel soaked with anything petrol.

[/ QUOTE ]

Sorry, finally got it by squeezing the line. Obviously have a lot to learn about this truck. Day 2 of ownership wasnt a good one [img]/ubbthreads/images/graemlins/frown.gif[/img]

I'll put up a proper introduction now
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Old 04-02-2006, 11:33 PM   #14 (permalink)
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Re: Won't shut off when key is turned off

Dano Ya did good so far...............

Please be so kind as to put much needed info in your signature, go to "My Home" at the top of the page then "Personal info" click "Edit" put "all known" particulars for your truck/van in the signature block, any other info you feel worthwhile in other parts of this area. Fill in the "geographic location" too it is just as important, members can then direct you to the best known suppliers for parts, repairs, fuel etc closest you by location/ area/country. You could be just around the corner from a member willing to assist you or a parts store with what you need..
THANK YOU

Visit the News, comments and suggestions forum for info on Avatar and picture gallery posting.
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Old 04-03-2006, 11:44 PM   #15 (permalink)
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Re: Won't shut off when key is turned off

Done, thank you!

Did't work on it today. Going through some buyers remorse after having trouble on day 2 of ownership.

Paid 3k for it, it's been worked hard I think but should have alot of life left in it
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