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03 engine won't shut off

899 Views 6 Replies 4 Participants Last post by  chewey
Looking for help. My 03 3500 will not shut off. Remove the key, keeps running.
Dash gauges are still hot. A few weeks ago, when turning off and removing key there was a delayed reaction of about 5 seconds then the engine would shut down.
Now it does not shut off at all. Anyone with ideas as too why?
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· Substation Operator
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fuel shutoff solenoid failed. You can shutdown the truck for now by blocking the intake with a piece of wood.
 

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IF his gauges were still hot then it could be that his ignition went bad and it isn't cutting of power. Probly wrong but just a guess
 

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Discussion Starter · #5 ·
To shut it down I put the truck in 5th gear and held the brake and stalled it.
I do not want to do that again. The problem is not the the fuel shutoff valve.
I tore apart the ignition last night and found out it is not the source of the problem.,
Something else is keeping the ECU/PCM live. I would have thought the ignition was the only way to put energy into the ECU. I need a fail safe way to shut down the truck.
Does any one know where is a good place to tap into the the ECU power?
 

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Discussion Starter · #6 ·
Here is what I know so far.
1. I have the TST by-passed.
2. I have battery grounds disconnected.
3. I have the ignition connector unplugged. (in steering column).
4. If I connect the battery ground, every thing becomes live same as if key switch in "run" position.
 

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Discussion Starter · #7 ·
See post in 3rd Generation Power Train::search.. "Electrical Glitch" for solved problem.
 
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