Truck stalls when using passing gear

[Larman64]

I recently purchased this 2005 ram 1500 with the 4.7 engine. I’ve had an issue while accelerating and activating the passing gear that the truck just stops. I have already change the camshaft sensor and the fuel pump was recently replaced because it was no longer working. In addition the computer was also replaced just before I purchased it. I’m leaning to thinking that maybe it’s the coils or does anyone have any ideas?

 

[crash68]

I would watch the fuel pressure, you'll want to test it under WOT that cause the truck to stall.