2000 f250 7.3 Very odd issues
Crank no start
Has new batteries
240rpm cranking
After going over all fuses and relays and verifying that they work I finally hooked up my Autel Ultra.
The scanner will sometimes enter the pcm and sometimes wont. I found it will usually work right after i turn the key, but then sometime later it will not have any communication with pcm. it goes back and forth and sometimes when turning key back on it wont communicate.
I hooked up my breakout box and verified grounds and voltage.
Im not sure if im getting a bad connection but when hooking up to a random body ground I get about 20ohm resistance on both ground pins on the DLC. If i connect a jumper from battery to lead and then test i still have about 1.6 ohms
I thought maybe there is a ground issue but then I discovered that the brake booster was leaking powersteering fluid onto the pcm. I pulled it out and the connector was full of fluid. I took everything apart and cleaned with contact cleaner. I was busy so It sat for a week in front of a fan to dry. cleaned the female plug for it as well and let it dry. I did have some gunk built up on the male pcm pins that resembled corrosion but i think it was just fluid that had gunked up. I cleaned it all the best I could.
Plug it back in and still weird communication issues and crank no start.

After suspecting the autel of having an issue, instead of the pcm, I hooked my laptop up with forscan. As far as I can tell I no longer have communication issues and every time i tried accessing the pcm it worked fine. Switch back and autel doing same thing where it has no comm with the pcm randomly.
I feel like maybe the pcm is compromised but not 100%.

Back to Forscan - Everything reading fine. Only codes i can get are from unplugging the ICP.


I did just notice that if the ICP is plugged in, the service engine light goes immediately off. If it is unplugged it stays on like it should. does this mean short in icp/wiring/pcm?
Fuel heater unplugged for all of this.

LIVE DATA - With icp plugged in The ICP goes straight to 14,xxx kpa/psi and the IPR almost immediately goes to 46%.
With the icp unplugged the icp goes to 15,5xx and ipr goes straight to 41%

Note - Buzz test produces no noise at all but also shows no codes with it.
None of the KOEO demand tests produce any codes at all. While cranking and testing over and over I get absolutely no new codes in the pcm.

Not sure if i have several issues or just one weird one causing multiple problems.

Any help is greatly appreciated!!!