My buddy just got a 2000 Excursion with a 7.3L. It has the AFE Intake, Banks Monster exhaust, Trans Command, Otto minder, and Big Head BOV. The trans command was unplugged when he bought it. We plugged it in and drove it.
The drivers fender well was off of the vehicle due to a leaky fitting on the back of the head. The truck was driven with out the fender well in the rain. The next day he drove it for 5 miles and the truck died. I pulled a P1670. We unplugged the trans command to rule it out. After further investigation we found the connector for the IDM full of water.
Well we got a new IDM and the truck fired right up. It idled for 5 min or so and as soon as we put it in drive and hit the accelerator pedal the truck died again. Now it wont start again. We are still getting the P1670 code (no EF between the IDM & PCM).
We snagged an IDM out of a 2001 with a slightly different OE number on it. We installed it and it was ruff to start, but we could get it to start and idle. As soon as you hit the accelerator it dies, but will restart.
We then installed the new IDM back into the truck and it just cranks, no start.
We swapped each of these out 2-3 times, and disconnected the batteries every time. The P1670 always comes back, but one time it flashed a security code (I cant remember the code) but I could not duplicate it.
Any ideas, we are at a loss.