what is the crank sensor actually doing on a 12 valve engine? why does it need it?

 

It lets the computer know the truck is running.

 

I am wanting to strip everything off of my truck for pulling, i was going to do away with the computer, but i wasnt sure what all i was going to run into by doing this. I just want everything off of the truck that is not necessary, mainly because most everything on the truck doesnt even work!

 

No crank position sensor on a 12 valve, it has a engine speed sensor (ESS)
You'll only need the computer and ESS if you have a auto tranny.

 

Your right!! but you will still need to figure out a charging system with no computer.

 

Any external 12 volt regulator will work.
I've used them a few times when the regulator portion of the PCM goes out.

 

Yeah I thought I was going to have a problem with the charging system, I have the wiring diagrams I just need to study them and figure out what to do!

 

Here you go http://www.cumminsforum.com/forum/94...w-89-02-a.html