PCM trouble????? - Diesel Forum - TheDieselStop.com
Power Strokes 1994-1997 General Technical discussion of topics related to vehicles powered by the Power Stroke engine in 1994 through 1997 models.

 
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post #1 of 2 (permalink) Old 04-25-2019, 08:48 PM Thread Starter
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PCM trouble?????

Hey guys I have a 1995 powerstroke that's been layed up for awhile due to it running badly. I ordered a reman. IDM and replaced. The truck now runs fine but new problems are happening., now the trans doesn't shift, speed odometer or the odometer do not work. I have checked all fuses and a few relays with a multi meter and everything seems to be good. I'm thinking the PCM is bad but the truck runs fine, has anyone had an issue with a partial PCM failure. Not sure if that's even possible. I haven't had time to try to see if I can communicate with the pcm with a scanner since the truck is broken down two hours away. A little history about the truck. Transmission was rebuilt about 4 years ago.The IDM was replaced about 2 years ago, I found bad valve cover gaskets and pigtails at this time and they were replaced. I inspected the gaskets and pigtails this time and they are good. The truck stays inside a shop so its not out in the rain where water can get to the pcm or idm. Any ideas??????
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post #2 of 2 (permalink) Old 04-25-2019, 10:59 PM
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Can't help you much but a possible cheap fix would be the vehicle speed sensor on top of the rear end.

The signal from it will cause all of the problems that you listed.

96 F250 PS XLT 4X4 long box, 5sp,4.10, manual hubs,pyro+boost guages, Dark Toumaline, add a leaf, Dale's TYMAR, and HX hose, downpipe, coolant filter, Luk clutch
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