I replaced the icp and the truck started and idle for 15 minutes bit once o put in reverse it died and now it just cranks. And clue? Could the ipr be bad as well?

 

Could be a bad ipr, what was the reason for replacing the icp?

 

Was acting up.the truck had loss of power.then we were on the freeway and it started slowing down.it didn't shut off till about 40 MPH.we floored it and it wouldn't go anywhere.then it wouldn't start up.it started with the icp unplugged

 

have you tested ipr?