Crank no start

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Aug 17, 2019 | 09:40 AM

Kai Herrmann

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Tuned

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Crank no start

So my Excursion didn't start this morning, I have a code for cam sensor and I'm not getting FICM sync. During crank, I have RPM on my forscan but not on the gauge cluster, not sure what that means.

What other info do we need to diag this thing?

Aug 17, 2019 | 09:48 AM

bismic

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First, check cam/crank sync when cranking.

Post the cranking rpm's and cranking voltage.

Aug 17, 2019 | 10:10 AM

Kai Herrmann

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Tuned

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Cranking voltage is almost 12v . It's spinning fast.
I don't see an option for cam/crank sync?

Aug 17, 2019 | 10:50 AM

bismic

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Maybe the signal is bad from the crank sensor. That is one reason to post the rpm value reported by the pcm, but whatever.

You should be able to read cam/crank sync on ForScan, but I suspect it will read 0.

Aug 17, 2019 | 12:22 PM

xcrsp440

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Our 6.0 had similar issues. Ultimately ended up replacing cam sensor and the pigtail. Shielding with foil. That helped, no new issues since that repair.

Aug 17, 2019 | 01:10 PM

Kai Herrmann

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Tuned

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Quote:

Originally Posted by xcrsp440

Our 6.0 had similar issues. Ultimately ended up replacing cam sensor and the pigtail. Shielding with foil. That helped, no new issues since that repair.

I ended up unplugging it and then plugging back in. Also found someone had replaced the pigtail at some point so I replaced those connections. Also replaced FICM relay. Tried to start it and it fired right up, so I don't know which fixed it. I did plug the original relay in and tried starting again and it fired up. I put the new one back in though and just kept the old one as a spare.
I"ll just have to keep an eye on the harness and plug in case this happens again.

Aug 17, 2019 | 02:23 PM

xcrsp440

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Keep your fingers crossed. We initially replaced the cam sensor, and everything worked fine for about a month. Then symptoms reappeared. Then replaced the pigtail. Two years now without issue.