Originally Posted by Fixxxer22 (Post 3890463)

Ok, the high side of the injector voltage is 100v. That is why the harnesses are marked in red tape. Please be careful. Also, the IDM (injector driver module) senses a fault on one injector it will shut off the card in the IDM that controls an entire bank. You could have something odd, like a circuit low on one injector on the lh bank and the UVC harness disconnected on the rh bank. You need 500psi of high pressure oil before the IDM will even think about sending voltage to the injectors. Ck the obvious first, fuel and oil. Ck and make sure you have module prove out. When you turn the key to run the ck engine lamp and glow plug wait to start lamp should illuminate. Also, you should hear that loud "snap" of the glow plug relay closing. The dash lamps and interior lamps will dim due to the large load of the glow plug system.

This may seem odd but i see it lots. Make damn sure that the battery terminals are clean and tight makes sure the pinch bolts move in those old lead terminals. make sure the posts and terminals are clean. also make sure you are starting with two good batteries. During glow plug operation and cranking... If you drop below 8v the modules like PCM and IDM will go to sleep.

Originally Posted by FIXX (Post 3885468)

that was the first thought,,offshore sometimes they short so bad it leaks fuel out the filter housing,,like mentioned if the fues is blown you can un plug it to get it to run but it may take a long crank to start it..if that not it they are known for crankshaft sensore and the high fuel pressure switch which is i think in the cylinder head..beed a whyle since i had a 7.3 with any problems..try unplugging the idm and leave it unplugged,,have someone crank it and plug it back in whyle cranking,,may start..