Hi all,

   First post on MoparMan's site but I have been reading this forum and many of his threads from diesel resource for quite some time. First things first a little background on the truck. The truck is a 2004.5 SLT, I do not have a lift pump it has been converted to in tank fuel pump, it's a CP3 injector pump system. I run a Edge CTS on setting 3, Timbo APPS installed last October, Transmission was rebuilt less than 2,000 miles ago, batteries were replaced at the beginning of October. If any other info is needed just let me know. Now down to the problem at hand when I went to pick my truck up after the transmission rebuild my batteries were shot so I bought 2 1000 CCA batteries to replace them and fired the truck up and left. Since I picked the truck up it was having intermittent dead pedal issues just as it did previously when the APPS when out so I reset the APPS and re-calibrated it. The problem went away for about 2 weeks, then on a trip back from Savannah the problem reappeared so upon returning home finally I reset and recalibrated the APPS again. The problem went away for about a week, I made another trip out of town this past weekend with 0 problems, but Tuesday morning I get in my truck to go to work and the dead pedal issue is so bad that I can't get out of my driveway. Every time I would attempt to accelerate it would throttle up and begin to accelerate but then drop back to idle and would do this up to 4 times in a distance of 8-10 feet. My fuel pressure is good as my gauges show 6.8k at idle and then appropriate numbers with the increase of RPM. My MAP readings seem to be good as I have been watching those and my Fuel Pressure since the dead pedal came back. So I stayed home yesterday and started trying to diagnose the issue, I started by checking my voltage on the APPS while moving the accelerator through it's range of motion. At "Idle" I was at .664v DC this is normal for the Timbo or so I've read, once engaging the accelerator it ramps up voltage smooth and steady all the way to 3.2-3.3v DC at this area my multimeter jumps out of range and doesn't read anymore. Once the accelerator reaches 3.4v DC my meter returns to reading the voltage and it continues to 3.83v DC just as smooth and steady as before. Also my meter isn't cheap it is a Fluke 77 and I've never encountered problems with it giving bad readings. Guys do I need a new APPS or is there another underlying issue I need to be concerned with? Thank you for your help in advance if any other information is needed just ask.

Also there are no codes other than Intake air heater #2 low voltage (P2607)

Geno's Garage

https://www.genosgarage.com/product/bf-3963983/gauge-related

Well the banjo bolts and washers came in and I installed them. The fuel delivery error is gone but the dead pedal remains. I did the trans trick again. Heated it to 230 in the driveway then allowed it to cool and the truck drove fine. Absolutely 0 dead pedal. I'm officially at the end of my diagnostic ability now lol.