2000 Excurison 7.3L PCM fried? - Ford Powerstroke Diesel Forum
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Old 01-09-2012, 06:34 PM
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2000 Excurison 7.3L PCM fried?

Excurion just died while driving down a bumpy road. Now has no WTS and I have check all fuses 10 times and swapped relays. Also it has a TW chip that could have slip in and out down the bumpy road YIKES

Tried to hook up a Superchip to read code and will not communicate with the superchip.

I pulled computer and checked the pins 71,95 and it is getting 12 volts.

Theft light blinks real fast.......

Anything i'm missing that I should check?

If the computer is fried do I have to take it to the stealership to reprogram it?

Last edited by 87gmc; 01-09-2012 at 06:36 PM. Reason: Left a few things out
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Old 01-10-2012, 09:13 AM
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The no WTS light is your first clue. Chances are, the fuel bowl heater shorted out and blew the fuse. That same fuse supplies power to the PCM. What you need to do is unplug the fuel bowl heater and then replace fuse #30. You can leave the fuel bowl heater unplugged to keep the fuse from blowing again. A lot of guys have had this happen and never plug it back in again.
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Old 01-10-2012, 10:48 AM
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Went threw all the fuses and triple checked all specially the #30.

All good

If PATS is active will it shut down the PCM?
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Old 01-10-2012, 11:25 AM
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Pats will keep the engine from starting yes. If PATS is causing the issue, I would suspect your chip either not being seated properly, or it's fried.
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Old 01-10-2012, 01:24 PM
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Even if PATS shut down the PCM it still should communicate through the port correct?

I'm getting no connection at all.
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Old 01-10-2012, 04:17 PM
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Do you have power at the lighter socket? Not the power point but where the cigarette lighter should be.
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Old 01-11-2012, 11:25 AM
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Yes power at all points.

Even have power at the pin where computer connects.

Will PATS cause the PCM not to communicate through port?
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Old 01-11-2012, 02:02 PM
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It shouldn't that I know of but some of the intricacies of PATS are over my head
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Old 01-11-2012, 02:22 PM
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Probably need a new PCM that is what was wrong with my 2001. No wait to start light once I replaced thePCM she fired right up. They cost about $500 and need to be ordered to your vin #. Everybody told me there was no way that was the problem they never go out but mine did. By the tests you have done I would be willing to bet it is the PCM.
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Old 01-23-2012, 06:47 PM
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on excursions ONLY!!!

you may need to reset your theft. you stated that everything works but it doesnt start, on excursions only it is real easy to reset these and you can do it without ever lifting the hood. now i am gonna try and remember this off the top of my head for now and look it up later, hopefully i will get it right and you will be up and running.
turn key to the "on" position and the theft lift will blink really fast for like 30 seconds and then either slow down or stop- do not attempt to start!!
turn it off and let sit for 15 seconds..
put the key in again to the "on" position again do not attempt to start!!! leave it for about 20 seconds.
turn it off and remove the key again for 15 seconds.
put the key in and start.

again i am recalling this from my brain but i think this is correct!!
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