Checked for power at the PDS and everthing checks out there according to the schematics. Then checked the PCMS pin 9 for power and pins 11 and 12 for ground and that checks good as well. So we are getting power to the relays, and getting power to the PCM. We then tried get trouble codes and I get no check engine light at all. If I remember correctly, the check engine does come on when you initially turn the truck on. And since the PCM controls the power to that light I am ruling that the PCM is dead.

Any thoughts?

 

Checked around here and the cheapest used PCM I can find is 200. Anybody know of a place that I can pick it up cheaper than that?

 

Did you replace the crankshaft position sensor?

 

Didnt have to. We tested it and it is good.

 

Besides, even if the CPS was replaced, That wouldnt explain why we are getting power to the PCM and no trouble codes...

 

I'd find the pin outs on the PCM to the check engine light and hook a bulb to it and see if you get any flashes that way, it is possible with it being 17 years old the check engine bulb has burned out.

 

If you haven't yet found and fixed this problem yet, I believe I might be able to throw some helpful ideas your way as well. Long story short, last week when the mechanic that did my engine swap was fixing the ignition timing, that little metal piece on the rotor popped right off of the plastic itself which of course will not make your engine run at all. I would check to make sure yours didn't pop off as well, suddenly not being able to start your truck after it was just running could be caused by that same exact problem.

 

Cap, rotor, pickup coil were all throughly inspected and nothing visibly wrong with any of them. We used an ohm meter to check all the sensors related to ignition and they checked out fine.

When we didnt get a check engine light when attempting to start the truck we put a jumper on a hot wire to pin 32 which is the check engine light and it stayed on with the ignition. So we knew that the PCM wasnt relaying a signal to the light.