Jaxz

Just following up with what ultimately was wrong with the truck. It needed a new computer. There were signs that it was failing for awhile but I didn't make the connection. Driving on 7 cylinders was the last straw to push it over the edge. New computer fixed all issues.

Hunh? Originally there was no wire to the plug on initial drive to parts store.

Don't have a scanner, it's a OBD 2 unit that shows rpms in real time.

Yes, did the battery disconnect for 13 min, touched together 15 seconds, plugged EGR back in.

I read somewhere that misfires can cause the crankshaft position sensor to lose its place. Had a lot of them during the 3 mile drive to the parts store. Could that have something to do with the tach, trans, and 39 degree advance?

Assuming the EGR was to be plugged in again. Back at square one.

Yes! Truck will now idle and engine runs smooth like normal. Trans still shifting hard and tach still not working. So what does unplugging the EGR mean surrounding this issue? Can't run without it can I?

Back in the day one could limp to the parts store on 7 cylinders but now with computers, well... Changed my spark plugs and broke a ignition wire in the process. Driving to parts store that way put my truck out of whack. After putting all new wires on it runs the same way it did with no wire. Huge mistake on my part. Now it won't idle, runs rough like out of sync, trans out of sync shifts hard (and I think late), tach stopped working. Only tossed one code P1404, replaced EGR. Can't for the life of me figure out what is wrong. Has anyone else been foolish enough to make this mistake and found a solution? Forgot to mention that spark advance shows at 39 degrees at 1500 rpm.