Backfires thru intake and exhaust

[Scott Shackelford]

2002 ram 1500 4.7l vin N. Replaced engine with 03 4.7l vin N crank no start unless I unplug cam pos sensor. Replaced cam and crank sensor. I was told the injectors came off of a newer jeep but was assured it was running. If I unplug the cam pos sensor it will eventually start but I have to hold wot or itll die if I plug cam sensor back in itll die. What am I missing compression is 140 to 150 in all cylinders.

 

[HemiLonestar]

The JTEC PCM's from 1999-2002(3-plug PCM) all use a 16-tooth tone ring.

The NGC PCM's from 2003-2008 (4-PLUG PCM) use a 32-tooth tone ring.

 

[Scott Shackelford]

Well thats about where I was on my thinking I have a 3 plug pcm and have installed a 32t engine from an 03. Guess I'm on the hunt for new crank ring and cam gear.

 

[HemiLonestar]

You do know you have to pull the crank to do that, right....? Do you still have the old engine?

 

[Scott Shackelford]

Ya I've been a tech for over 15 yrs on chevy. And no turned off engine in for core.