I'm reminded of a strange deal with my VDH pcm now that you may have some insight into...
When I bought this truck from Texas it came with that VDH pcm in it. The pcm has a white paper label on it talking about voiding warranty and how it's a reman.... so... it's been into by someone...
Weirdness is as follows:
The truck was a TOTAL dog all the way back from Texas. All through the night the truck would not even run over 80mph. If a slow car got in front of me and I went to pass, the truck would rev all up, make all sorts of noise and go NOWHERE. Over and over again I would be flat to the floor and a car from way behind me would overtake me (with their cruise on probably) before I could even move forward enough to get over and pass. This was at like 70mph, lol.
I'm talking DOGGGGGG!
When I got home I tossed the scanner on the truck to see what I could see, and nothing really seemed wrong.
I started to pull out of my parking spot and as soon as I touched the pedal the truck spun the back tires... Driving around the truck had twice the power, suuuuuper responsive pedal (too responsive for my taste) and the trans shifting strategy was different and shifts were firm...
All I did was put the scanner on. Truck drove like that, making okay power, albeit at abysmally low icp and the top 1/3 of the pedal was no different than the middle 1/3, so on and so forth, but relatively quick and decent for an 8100lb truck with stock injectors.
The first time I changed the batteries I got back in the truck, not even thinking about the pcm and bingo.... dead turd again. SOB wouldn't get out of its own way, just like before. I had to stop what I was doing and drive to my scanner, plug the scanner in, start to connect and immediately take it off because the truck was in Mr hyde mode again, response back, power back...
Anybody know WTF was going on there? To this day that pcm is like this. If I put it in my truck right now it would run the dog program until I hooked up the scanner, then it would switch to the power program...