Hello all. I have a 1995 Dakota that I just swapped from a 3.9 to 5.2. The first start up went real smooth and fired right up. It idled for around 5 minutes then I cut it off. I tried firing it back up a couple minutes later and I get a very rough idle and it did nothing but stall on me within seconds. I replaced the ignition coil and the MAP sensor but it didn't change anything. This morning I started it and it fired right up and it idled smoothly. I cut it off and was going to go for a test drive thinking it was fine but it did the same thing (rough idle/instant stall). I'm at a dead stop and I don't know what it can be. Some of the sensors that are new: IAC, TPS, MAP, Crank position sensor, Cam sensor, Engine coolant sensor, new PCV. I know I have spark and I know I have fuel but it just doesn't want to stay running. Thanks in advance
Also to note: I am running a V8 computer and the V8 flexplate

 

Disconnect the front O2 sensor. See if it will idle.

 

Still spits and sputters. It wants to start

 

If you give it a little bit of gas, will it stay running?

What brand cam/crank sensors?

 

BWD sensors. I can keep it running for little bit when I hit the throttle. RPMs don't go up at all though it just lets more air in then dies

 

Sensors may be part of the problem. Dodges just don't seem to care for aftermarket sensors in critical locations.

May also want to check fuel pressure.