Join Date: Nov 2010
Location: Yuba City, ca
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OK. That looks like engine, not trani. either electrical or fuel, maybe both.
It is not going to be eay. If you can get somebody to check live data while doing it would be best.
one thing you can do is put a tap in the wirefron pin3 in the apps plug. It is the output wire to the ECM/VP. Tap the wire and hook up some 6 foot jumper wires, one to it and the other to ground on battery. then run the wires to the cab and hook up a voltmeter and set it up to read while driving. It should read abut .5v and steady at idle or with the key to on. Then it should smoothly graduate to about 3.8v at WOT.
When going down the road with foot on it or cruise on flat it should hold steady at whatever you are holding it at within a few hundredths of a volt. If it jumps or cuts out like the tach when it does that the APPS is bad. If it holds steady but hickups anyway the issues is likely in fuel delivery, ECM or more likely VP44.
Maybe edge issues too. Remove it and test. Same for any other mods.
Make sure all battery terminals and harness plugs are PERFECTLY CLEAN AND TIGHT.
The beginnings of internal mechanical issues in the timing in the VP will often not show codes until complete failure.
Always use scan tool rather than key for codes.
99 2500, Quad cab, 4x4 47RE, BD pressure lock on it, small BD 90/140 chip on the VP 44 connection plug, 17" 3rd gen wheels. 3.55 diffs. Ruenell front bumper and warn winch, Rancho adj shocks. 663k miles.