[Herb in Tx]

Ok I did the search so :flipoff2:

Now for my question.

I am swapping in a 2001 cherokee 4.0 into my 83 CJ. I get no spark. I just tested my Crank sensor and it is bad, so I will get a new one. I was testing the whole deal and found that I have 5V on the signal wire with key on and the sensor plugged in or not. What's up with that? Is that what it should be? The FSM basically tells me squat except how to replace it.

Any ideas.

 

[Jerry Bransford]

The CPS is a passive device so you're seeing the voltage coming from the PCM (engine computer). The CPS is really nothing more than a coil of wire that generates timing pulses as the machined timing marks on the flywheel (or timing pulley in some aftermarket engine installations) spin by.