Originally Posted by markford
code reader just sits on 000 when i try to run the KOEO test.
Hard to say, I don't use code readers, I check them manually at the diagnostic connector either using a meter, test light, or check engine light (if equipped). Don't want reliance on another device. Not getting any codes at all, need to go through the diagnostic connector wiring (check continuity), everything checks out I would most certainly suspect that the computer has failed since it's mal-functioning. Hard to diagnose problems like this over the net, though. I have an 88 auto computer lying around, might take a few small modifications, but would eliminate the EGR system at least if you have an auto trans.
Does the truck run???