p0672,p0674,p0676,p0678(glow plugs 2-4-6-8),p1209(icp),p1211(icp hi-lo) my question---does changing programs cause these codes? i can see the icp codes but the glow plugs i would think is a seperate cause.If anyone has any input let me know

 

Checked the glow plugs and wiring(thanks csipsd for the great artical on this) found the glow plug controller bad. Also put an led light on the solinod another great artical. As far as the other codes for the icp I cleard them and so far so good. I've put about 45 miles on it and we will see tomarro how it goes

 

Move it down here for a bit more exposure...

Sounds like a bad GPCM and normal ICP codes for a DP tuned truck.

 

Yep it was a bad gpcm changed it ( ford was 201.00 napa 131.00) went with napa truck runs fine no light got 45 + psi put the banks big head actuator and the truck will smoke the tires till u let off thanks for all the great info