Truthfully, I am stumped on this one. I know it does not help Steve very much, but we have covered just about everything that needs to be covered. Unless he is doing something wrong, which I don't think so, the darn thing should run.

I have seen the strange idle thing before and I could swear it was a TPS issue. Or it was EGR. ? I just do not remember. It was someone else's rig, but between those two things, we fixed it.

I would sit down with the manual and a multi-meter and start testing the various sensors. And again, checking everything that has been checked multiple times already...

Michael