New injector/won't start

[garyeco]

I've been searching this forum but haven't come up with anything that seems to help. My 95 f-350 cc 5-speed developed a miss so I pulled both valve covers and discovered #7 wasn't pumping any oil. I got a used injector from a donor rig we have and installed it. I unpluged the cam sensor,removed the glow plug and turned it over a few times to purge the cylinder.Installed new valve cover gasket,harness,plugins. Before I put on the valve cover, I started it. It ran great. Put on the cover, no go.No smoke from the tailpipe,tach seems to work. Cranked and cranked still nothing. Tried towing it for about 3 miles. Got what seemed like a pop every once in a while but thats about it. Also CEL came on and off along with WTS. Got it plugged it tonight along with battery charger for tomorrow to try again. Anybody got any ideas that I'm missing? Also put on a new cam sensor for grins.

[Haulstroker]

Originally Posted by garyeco

Before I put on the valve cover, I started it. It ran great. Put on the cover, no go..

If it ran without the valve covers on and now it doesn't with the valve covers on, and there was ABSOLUTELY nothing else changed, installed, tightened or connected, my guess is there is a short under the valve covers or other wiring was disturbed when they were reinstalled. Unplug the IPR or IPS and see if it starts also.

Check that fuse 22 with an ohm meter rather than eyeballing it.

Usual tests like the HPOP being full, fuel pressure when cranking, blah blah blah.

[garyeco]

Haulstroker, you were absolutely right. I took the cover off and discovered that 2 of the injector wires had gotten hung up on the lip of the head and got smashed when the cover was torqued down. I gotta get some stronger glasses and take my time in the future. I owe ya my friend,thanks for getting back!

[Haulstroker]

Just don't ask me how I came to think of shorted wires after reassembling something...