2002 Dodge Ram 1500 4.7 won't start.
 

I'll start from the beginning. I got the truck about 5 or 6 months ago now, i knew it had problems. It would run and drive just fine until it got warmed up and then it would stall when stopping. You could start it back up and drive, but it would backfire some. Once it stalled a second or third time, it would refuse to start back up until it cooled down again. It had also slight misfire in cylinder 2.

So then 2 months ago, I went and got a bluedriver scanner to pull the codes. These are the codes
P0340
P0031
P0037
P0320
P0132
P0302
P0138
P1391

I went and cleaned out the throttle body and that made it be able to drive a bit longer before stalling. So then i went and replaced the camshaft position sensor and attempted the crankshaft position sensor but it broke off. I got it towed to a mechanic and he got it out and put the new one in for me. He couldn't get it to start afterwards. He tried his scanner and he said he couldn't get any codes and so he thought the pcm died. We just had it towed back home. At this point, I went ahead and replaced the battery cause it was getting old. Then I checked for fuel pressure, spark, and got nothing. It would crank but not start.

I also tested the scanner again to see if I could get anything, but it wouldn't scan until the truck was running, which obviously isn't gonna work. So i ordered another scanner that can do it from ignition on, but not running. That scanner pulled no codes.

So now I just wanted to see what people thought about it, should I go ahead and try replacing the pcm?

Just thought i would update anybody that may be curious on this topic. I replaced the pcm today and the truck started up and runs fine now. 2 codes remain, P0031, and P0037. I'll fix those tomorrow and everything should be all good to go. As of right now, it does not have any running problems.