What are some of your opinions?
I think it's the tune, but I haven't heard back from my tuner due to holidays and weekends, so I have no clue.
07.5 6.7L Cummins 68RFE, S464 Turbo, BBi new stage 1.5 injectors.
Ported & fire ringed head RaceME Ultra on custom tune w/ trans, Airdog 165, Banks intercooler 3.5" pipes.
I just got the truck back together last weekend and have been cycling it all week to ensure everything has been good before nailing it on.
Well, today, I let it rip, and she only pulls in at the end of 3rd and lights up 4th.
Then, it falls on its face practically into fifth and cuts out to 4.5 degrees timing.
4th will light up any rpm, even at a bog.
It will hit 25k rail, 35lbs of boost, and 25 degrees timing.
No, there are no fuel leaks anywhere and no boost leaks.
Then, as I got close to the house, suddenly, as I stopped, the truck started loping, and I watched the ECM voltage jump back and forth from 13.5 to 14.2 like a heartbeat.
So I read it, and it stopped.
I went to roll the windows up and hit the switch, and the cluster lights would flash on.
Then the truck started faintly flashing interior lights again, but nothing outside was flashing, not headlights, tails, cab lights, nothing.
What is going on?
Thanks for any insight in advance!
I work on vehicles for a living and have been doing wiring for years!
UI sed actual copper 0/1 gauge for all new cables with heat shrink.
The battery is brand new and has been sitting on a Ctek charger.
Lugs are tight; I can't move anything, and I know these trucks are sensitive to terminal resistance.
And on another note, the truck would never lock into 4th gear when it was in auto mode.
It would ride 3rd out high, skip over 4th, and hit 5th at 45.
The only way I could ever get it to lock 4th early was to select it manually.
Now, with the new trans tune, it locks 4th at 35-4,0, but now it feels like i have absolutely nothing in 5th.
I didn't want to try six because the truck would try and downshift back to 5th.
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