Reply to thread

Message: [QUOTE="6.0 Tech, post: 1497179, member: 23001"] So im lost on this one. It is Charlie from kc turbos truck, something is broke in the motor, and it wont start. Cranks good. This apparently happened at same time, he shut it off when he heard evil noises, and tried restarting after, and its a crank no start. Icp 1200-1500 cranking, rpm 180-200, drops as batteries start dying, ficm at 47v, l and v pwr at battery voltage. Sync was good, cmp fault was no, no ficm sync. Tried ficm off one of his other trucks, no change with ficm sync. Load tested communication wires from pcm to ficm, found 1 open. Replaced engine arness, no change. Unplugged injectors 1 at a time, none changexd. Unplugged both injector harness connectors at ficm to rule out ficm harness, no change. Shield ground is attached to intake as well. Swapped pcm from my truck that runs, they have thr same strategy, no change. Swapped ficm from my truck, no change. All pins at ficm, pcm, and inline connectors are not pushed out or broken or anything stupid like that. Swapped in new crank sensor for ****s and grins, now have cam fault, and obviously lost sync. Swapped in cam sensor that was planned anyway, still have cam fault and no sync. Swapped original crank sensor, as seemed to be what caused cam fault, even though reading rpm right, still cam fault. Swapped old am sensor back in, still cam fault. No buildup of chit on either cam or crank mounting bosses, but i will be taking emery cloth to them tommorow. Inspected crank tone wheel while cranking, didnt see any bends, doesnt mean its right, but its turning straight. Couldnt see too good thru cam hole, but thought i may have seen the cam button go by. I was just using a mirror and flashlight. So in short new ficm, pcm, harness, cam and crank sensors, and no start. Any ideas? [/QUOTE]