Got a good one for everyone to fiqure out

Craig@MFI · Mar 14, 2012

A 06 6.0 f350 wont start unless you unplug the pcm and plug it back in
truck will crank and injectors will fire but wont start unless you unplug pcm and plug it back in starts right up

Any suggestions

907DAVE · Mar 14, 2012

Whats happening to your communication bus?

Can you talk to all modules when it wont start?

Charles · Mar 14, 2012

If the injectors are firing, but the truck doesn't start, then you don't have ICP?

No smoke I take it?

Sounds like maybe the PCM is refusing, or is unable to ground the IPR. If you had ICP and the injectors were firing but out of time you would have smoke. If there's no smoke, the injectors are firing and it's not running, then there's no ICP, or no fuel if there is ICP.

Can you manually ground the IPR and see if it fires up?

thunderin jimmy · Mar 14, 2012

try unplugging the ICP and see if you still have the problem. That will quickly eliminate whether or not its on its way out. My truck had a bad ICP and then the PCM went right after. It sucked.