How to verify a bad PCM
 

My CEL came on recently and it had 18 codes stored basically a bunch of sensors didn't report, and one code 513 is replace PCM. I would like to do what I can to verify it's bad before replacing it, as I cannot afford to throw parts at it.

My truck is a '94 F350 5.8L E4OD 4X4.

Anyone got a spare PCM I could borrow?

Does the truck run OK?
When you turn on the key does the fuel pumps run all the time without the engine running?

it runs rough. The fuel pumps run for a secone then shut off

Check the 5 VDC Ref. Voltage and if is 5.0 +- 0.05 V then it is more than likely OK.
Run a self-test and see if it checks out OK with the codes.
If it passes the codes and the 5V I would say it is a good one.
Make sure you run all of the code tests and the timing test.

You do not need anything special to do these tests, just a paper clip and a meter.
If you do not know how to do the tests go to one of these sites links.

This is good for the KOEO test:
http://fordfuelinjection.com/?p=13

This one is good for the KOER test:
http://www.broncodata.com/tech/codes.htm

Unbolt the connector off the computer and make sure there ain't bad corrosion.

Adrianspeeder