wiring loom
 

anyone have experience on changing a engine wire loom on a 4.3L?
having a few intermittent starting problems,
already replaced starter motor, fuel pump, oil pressure sensor, plus a few other items like distributor cap, rotor and ignition sensor.
My experienced mechanic believes it could be a fault somewhere in the loom.
When a jury wiring rig is set up the problem isn't there. I don't think its a common problem but wondered if anyone here has come across this before.

cheers guys

Lewy