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[cdnsarguy]

I'm begining to think ignition switch..... has it been replaced since you have owned it.

The clutch pedal only comes into play in the start position... If and this is a supposition the ignition switch lock assy was installed one tooth out could/would the key position be between the start and run position of the ignition switch.

Try using a jumper from battery positive direct to the FSS on the IP... start the truck and see if it runs fine. You will have to remove the jumper to stop the engine.