95 E350 Computer issues
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4wd Low
Joined: Jan 2022
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95 E350 Computer issues
Computer started having communication errors with IDM and would shut truck off. Sometimes would start immediately and shut off again quicker until it wouldn’t want to start again. At the time replaced CPS and swapped out spare IDM. Same issue. Swapped out computer and bingo it was good to go. Fast forward 4 months later and it is doing the same thing shutting itself off on me again. Pretty sure this means this PCM is now messed up as well. Any ideas what I should look at that could possibly be damaging my PCM and causing this to happen?
(I also keep losing communication with the PCM with my readers as well, saying the communication fails. It’s been doing this about 75% of the time I’ve tried plugging my scanner in)
(I also keep losing communication with the PCM with my readers as well, saying the communication fails. It’s been doing this about 75% of the time I’ve tried plugging my scanner in)
Last edited by DynamicMan; Nov 23, 2022 at 10:59 AM.
Laughing Gas
Joined: Oct 2008
Posts: 1,106
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From: Kansas City KS
Vans have a problem with the idm getting wet. There’s a tsb on it with directions on keeping water from the windshield getting to the idm. When mine did this it didn’t take out my pcm but the pcm is sensitive to shorts and voltage spikes. When my idm quit it was immediately off, code reader wouldn’t work. I could key on and have dash lights but I don’t think it would crank.
Did your old idm have water in it? I’d look there first.
Did your old idm have water in it? I’d look there first.
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4wd Low
Joined: Jan 2022
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Vans have a problem with the idm getting wet. There’s a tsb on it with directions on keeping water from the windshield getting to the idm. When mine did this it didn’t take out my pcm but the pcm is sensitive to shorts and voltage spikes. When my idm quit it was immediately off, code reader wouldn’t work. I could key on and have dash lights but I don’t think it would crank.
Did your old idm have water in it? I’d look there first.
Did your old idm have water in it? I’d look there first.
going to check the pcm connector as well and clean everything the best I can. Don’t know if the pcm is too far gone or not from where I’m at. I switched the pcm with my spare oem when it first happened to me and it solved the problem till November. I’m to blame for not investigating further and assuming the swap was the cure. Now I know something is causing this issue, just hoping I don’t need to replace the pcm again just for it to fail because I fixed the wrong thing. Trying to get as much input as I can so I can make one large sweep and see if anything is out of the ordinary
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4wd Low
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I’ve used my Zurich and my fathers x431 from his tablet
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