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Old Oct 31, 2018 | 05:36 PM
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PCM Diagnostics Help Please

Ok, been doing a TON of research. I went out, started my truck this morning and it quit about 5 minutes into warm-up. It will crank, but no start. Here is what I know. Good #22 fuse, no OBD connection, no WTS light, no fuel pump operation, swapped relays and still no dice. Everything else Powers up except what is listed above. I ruled out everything from the flow chart. The flow chart leads me to PCM failure. He is dead in the water.

Anything I might be missing before I drop the heavy coin on another unit? Will any 7.3 manual SD PCM be ok, as in a 2000 even though I am early 99? A member has one for sale or I can send into the PCM repair guy, but I don't really have the time to be down right now. I did last week, but not this week FML.

Thanks again fellas. As always, great help here.
 
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Old Oct 31, 2018 | 05:47 PM
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I thought that fuse #30 was the one that mattered here.
 
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Old Oct 31, 2018 | 05:52 PM
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Originally Posted by Walleye Hunter
I thought that fuse #30 was the one that mattered here.
It's relay and fuse 22 I think....unless the fuse is OBS 7.3 only. Either way, both are good.
 
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Old Oct 31, 2018 | 05:54 PM
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OK, that covers that. I think (don't bank on it) that we can use up to an '01 PCM in our E99's
 
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Old Oct 31, 2018 | 06:03 PM
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Not all pCM “repair guys” are the same.... I learned the hard way and eventually ended up here.
https://www.dieseltechchatt.com/
nobody knows more about the 7.3 pcm then him.... he can repair what others can not.
 
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Old Oct 31, 2018 | 06:04 PM
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Originally Posted by Walleye Hunter
OK, that covers that. I think (don't bank on it) that we can use up to an '01 PCM in our E99's
Ok...I am waiting to hear back or have someone verify. I have a line on a 2000 for a manual transmission. Hopefully I'll get verification. I don't have the $$$ to get one and then have to reflash as well....not today anyway LOL
 
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Old Oct 31, 2018 | 06:05 PM
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Originally Posted by pirate4x4_camo
Not all pCM “repair guys” are the same.... I learned the hard way and eventually ended up here.
https://www.dieseltechchatt.com/
nobody knows more about the 7.3 pcm then him.... he can repair what others can not.
Thanks my friend. I'd send it to him in a second if I knew I could get it back pretty quick. I can't be down for a week. First world problems I guess. Does this sound like a PCM issue?
 
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Old Oct 31, 2018 | 06:24 PM
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Yeah pretty sure it's fuse 30 on a 1999. Remove wire from fuel bowl heater, replace fuse, do not replace wire.
 
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Old Oct 31, 2018 | 06:30 PM
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Pretty sure it’s fuse 30 too. Byron, I have my E99 PCM if you need to borrow it. Let me know ASAP I’ll get it mailed out tomorrow morning.
 
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Old Oct 31, 2018 | 07:52 PM
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Fellas, John came through for an FTE brother in huge way. Rep him like crazy if you can. I'm in jail.

I'll recheck that fuse and fuel bowl heater wire when I get home. I'll report back.

FTE never fails to amaze me. It's just a great place.
 
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Old Oct 31, 2018 | 08:07 PM
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I am in rep jail too for John...

Byron, did you figure out what PCM's the ZF6 will accept? That may be good knowledge to share here on the forum if/when you do find out.
 
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Old Oct 31, 2018 | 08:18 PM
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Im also in rep jail
I do personally know a Dac2/Dac3 will also work on a L99 ZF6
 
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Old Oct 31, 2018 | 08:20 PM
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I have a DPC-421 PCM in my truck best I can tell from my Hydra install records. Not really sure how that falls in line with an E99 or the DAC2/DAC3 that Wesley posted up though.

EDIT: The "box code" on mine is said to be XPC4, again not sure how this helps.

This is the image that I screen shot when I was installing my Hydra for future reference.



 
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Old Oct 31, 2018 | 08:26 PM
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Sous
 
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Old Oct 31, 2018 | 08:30 PM
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Are you telling me that I failed to log the appropriate information/code for my pcm when it was out of the truck?
 
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