i had the injection pump replaced with a remand one from oregon injection. the truck ran great for about 2 weeks then every time you put it to the floor it downshits and acceleratses and then shuts of. i have to put in neutral and start it back up but i have to either pump or hold the pedal. it is a 92 3/4 ton dodge diesel. it has about 400000 miles on it and the pump has about 300 miles on it. i am up for suggetions

 

Sounds to me like you are losing fuel somewhere.
maybe a leak in a feed line?...12v aint my bag!
someone will chime in soon.

 

Have you checekd the simple stuff first? the wiring at teh FSO and for leaks at the lift pump, filter and the lines/injectors?
How is it starting back up? will it fire right back up after shutting off?
I am thinking the FSO is engaging somehow... search under Fuel Shut OFF selinoid for info on it.......

 

Either the shutoff solenoid is doing it (probably caused by a linkage issue), or the linkages are improperly connected/adjusted... there's more than one way to physically connect them.

Someone with a runaway recently had this problem up on the board, do a search and you'll find some pertinent info with drawings, etc.

I think Infidel was one of the helpful contributors.