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no start, sometimes cranks sometimes no crank
I've got a 05 F350 4x4 Lariat with a 6.0. I bought this truck at auction and am having a no start issue. A little history on the truck first:
This truck was previously owned by a landfill company and was used as a supervisors truck. In the year before the truck was put up for auction, the following things were done to the truck. Both alternators replaced and all 8 fuel injectors replaced. When I got the truck, I removed the Napa oil filter and cap, and napa fuel filters. I replaced them with motorcraft filters, The upper alternator was missing , so I installed a new upper alternator.
The motor was hydro-locked and found that the rear fuel injector on the passenger side was stuck open and flooding the cylinder. I replaced this injector. After replacing the injector, the truck would start up and run. After driving for a short time, I would shut the truck off and try to re-start, I would get a no crank no start condition. When this condition was present, the wrench would come on in the dash and the odometer numbers would turn to -------'s (dashes). After cooling off for a short time the motor would start back up.
The wiring harness to the fan clutch was pulled apart at the connector, I got a used fan and re-inserted the wires/pins into the motor side connector for the fan clutch. This seemed to clear the no crank/no start condition. I drove the truck on short errands daily for about a week without issues, so decided to try driving it to work. It got me to work and back on day 1, but on day 2 it died. The motor would crank but not fire. Got the truck towed home.
I bought an autoenginuity scanner with the ford enhanced options. Over the next couple of months, I used the scanner several times, but do not recall what codes I had. A couple of weeks ago, I was performing a KOEO test with the AE and the scanner hung up. Since this happened, my AE has not been able to communicate with my truck. I have used it on my 99 F250 7.3 and my sons expedition, so the scanner is working, but will not connect to my 05 F350. Strangely since this has happened, the truck relapsed back to a no crank/no start condition.
I put 2 new batteries in the truck and hooked up a battery tender as I don't know how long it will take me to fix this truck. After the new batteries and disconnecting the PCM connections I still had a no crank/no start condition.
The other day while having a smoke, I decided to put the keys in and try cranking it. To my surprise the motor would crank, but still not start. No smoke at all out of the exhaust and no fuel smell in the exhaust when cranking. (same condition as when the truck died on me on my way to work).
Today I tested the FICM and got 0 volts with key off, 54 volts with key on while injectors were buzzing, 54 volts after buzz and 54 volts while cranking. Doesn't sound like a FICM issue. I tried connecting my AE scanner and still no communication and when I hooked the scanner up to my OBDII port, the truck reverted back to a no crank/no start issue. I can jumper the starter with the wire under the passenger side hood and get a crank, but still no start.
Anyone have any ideas or thoughts on what might be going on or what I can check next? Without the AE communicating I cant read the codes but I'm sure there are other ways of checking or testing components. I've got a multimeter to test with. OH yes, I forgot that I have pulled and checked every fuse in the truck and did not find any blown.
Thanks in advance for any help and sorry for such a long post.