Drove for 5hrs stopped, got fuel hopped in , turn key on and nothing, no dash no indicator being in park. Pull hair out, check fuses, still nothin, then dash starts working....good, but not cool. Drove down road and on highway guages drop out again, stays running but no rpm, no mph...? Then come back on, ***. Ill take my old 96 ANY DAY over this thing. Any ideas??

2007.5 6.7

 

Obviously electrical, maybe ignition switch or battery voltage way low.

Ron W

 

What is the voltage at the batteries with engine off and engine on? Check on the battery post itself and then check somewhere away from the post, such as on the terminal.

 

Sounds like the TIPM is starting to go. But check batteries and grounds before anything else. Could also be the cluster, have seen that in the 03-08 a few times but not many.

 

Yeah, TIPM and or switch is what I figured/guessed. I had the transmission rebuilt but they were trying to fix the mass air flow sensor as well. And I know he was taping wires together in the tipm no 'clean it up'..after THEY messed with it I had issues. So once I got truck home I pulled wire harnesses out of tipm sprayed them with light WD40, reinserted and will drive dang thing and see how it fares. And they didn't fix fuse 37 from blowing(maf), so I have the turbo unplugged to see if its that 1st, next will be erg servo... Thanks for all the replies thus far!!