2012 Crank, No Start - and Fuse 27 is not the issue

[PistonHead]

I shut my truck off Thursday night and went to restart it about five minutes later and, **** - the famous crank, no start issue. The no. 27 fuse relocation TSB was completed by the dealer awhile ago. I checked the fuse, it's good. Pulled the relay and tested it, its good. verified the relay and fuse were working together as intended, cranked it a few more times and then called it a night.

Friday afternoon I jump in and it started right up. I shut it off, started it again, on and off a few more times, then all of a sudden it died, then back to crank, no start. Tested the coils for fire, confirmed they are firing.

I replaced the fuel pump control module as a shotgun diagnosis, still cranks, no start.

Tried the additional two keys and have the same issue. attempted to start it with the remote start and it still cranked with no start.

Scanned it, no codes present

Verified the fuel pump is pumping fuel by pulling the line off the rail, even though I could hear it prime I wanted to make sure it was putting out fuel. It pumps plenty when cranking.

Optima battery is strong and fairly new but I pulled the cables, cleaned and re-secured them just in case.

So I have fuel and fire but it still will not start, any ideas? any help is greatly appreciated, thank you in advance.

2012, 120K miles

 

[beadblaster]

Check fuse 31

 

[MTF]

Check the connections down by the starter.
Inspect the three plugs on the PCM.

 

[PistonHead]

Starter connections are good, I just pulled all three ECU plugs and cleaned them as well, also tried a shot of starting fluid, she still wont fire

 

[PistonHead]

Check fuse 31

Thank you, just checked it and its good

 

[PistonHead]

Check the connections down by the starter.
Inspect the three plugs on the PCM.

Pulled the ECU plugs a second time, hose it down REAL good with electrical cleaner, started right up. I'm going to run it for a bit, then shut it off and back on a few times to ensure that did it. I will definitely report back the results shortly. If that fixed it I want everyone else that reads this post to know, If not, we'll keep going

 

[allinon72]

Did you verify battery voltage? Just to check it off the list.

 

[PistonHead]

Did you verify battery voltage? Just to check it off the list.

Battery voltage is good, everything looked good and checked out, that's what was so confusing.

 

[PistonHead]

Quick follow up for anyone reading this thread. I took if for a 10 mile spin, started and stopped it more then 20 times over the last 45 minutes. It hasn't skipped a beat, with all my years of experience, I have never encountered this so my confidence level is mediocre at best. I will post the next few days for others to see the longer term results and hopefully a true resolve to the issue. THank you for the help

 

[MTF]

Ford did a poor job on those three plugs with taping them up,
I warped more electrical tape around them after giving a good cleaning.
And a little O-ring grease to keep moisture out in the plugs.
Just food for thought.