Please Help! 2001 died when raining now wont start anymore

[SPC Haynes]

After weeks of reading posts and troubleshooting. Im stumped. My 2001 7.3 Diesel crew cab is dead. It all started when it would rain it would die sporadically when i would be idling or slowing down. when going down highway it seemed to die and start right back up on its own and jerk real hard as long as i was in the pedal. Also die when parked idling in the rain. I changer CPS, nothing changed. problem started to get worse and happened more and more. now sometimes I would try to start and it would crank and crank and i would have to push pedal for it to start. a few days later driving to post for PT in the rain it died and wouldn't start again. No smoke from exhaust when cranking. just crank and crank. I changed the CPS again, and the IDM as it seemed to have water damage and the plug had moisture when i removed it. still wont start. I don't want to keep dumping money into it until I know where to look next.
please help, I deploy in september and I need this thing on the road ASAP.

respectfully, Matthew Haynes

[SPC Haynes]

also, when its not raining I never had any issues with the truck.

[Dave]

Does it do any other random stuff before it dies like render your power windows inoperative.

Check and make sure the wiper cowl is free and clear of any debris. I have a feeling its leaking onto the GEM

[ToddOH43]

Mine did the same thing when I ran through a puddle. An hour later it started right up. It did it again when I ran it through a car wash too.

I quit washing it and running it through puddles, and havent had the problem since.

[SPC Haynes]

Hey Dave, cowl is free of debris. And I have never had any other issues before it dies. If its not raining its fine, when it rains it dies. And now it died for its last time, wont start. I wonder if Water is leaking down onto the PCM harness somehow and overtime it just got worse until it stopped working?

[greenmachine07]

might check for water under your dash behind the fuse box and were your PCM is. When i had problems with my GEM I read a LOT of threads about the seal on the windshield going bad and water leaking down your A-Pillar. might have cooked your PCM