Ok so since I built this pile from the ground up literally from bone frame im having issues of no spark or fuel... But then at times it starts right up n drives effin **** n strong! here are the basics of the truck its a 93 v6 2wd cab n CAB harness, bed n body panels sitting on a 92 4x4 318 frame,engine, enging harness n engine compartment harness ( 1 piece harness), pcm... I put a new crank sensor in for ****s since that was the only part i used from the 3.9l do to the original was broken.. Same thing.. when this problem occurs there is no power to the fuel pump and there is no power to the coil.. I read some stuff from google that there are a few common connecting points in the harness that corrode n or go bad where do i find these locations? I already checked the fuel pump n auto shut down relay.. There clicking every time the Key is turned.. Checked all fuses dash n bay.. And the engine light does its common I'm working signal.. Kinda at a loss now what else to check for n where to look in the harness can very be a short in it do to being handled out of the truck thanks in advance, Derek

 

I'm putting $100 on the notorious splice you've already looked into. It's located under the fuse box. Even if you've checked everything I'd redo it anyways. Here's the DIY for it, good luck!:

https://dodgeforum.com/forum/1st-gen...ml#post1678925

 

ditto on the splice. if it's not that i'd say it's pretty much got to be the ecu.

 

U owe me 100 bux lol I replaced the splice
n same thing n the pcm isn't the issue either i swapped the pcms between my trucks

 

if you have a spare camshaft position sensor, i would say try that. Its inside the distributor. My truck would run like a champ and then some days would just turn over and not get spark or fuel. Relays would click on, but immediately drop off. If the truck cannot get a return from the camshaft sensor, it will not let the truck start.