6.7 liter loses timing not drivable - Ford Powerstroke Diesel Forum
6.7 Motor Problems (2011-2016) 6.7 Motor Problems

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post #1 of 49 Old 03-15-2019, 12:44 PM Thread Starter
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6.7 liter loses timing not drivable

Hello all. Really need help. My truck has been in 2 different shops over the last 6 weeks and no one can fix it. Last of which is a ford dealer. INFO - It is a 2013 F-350 6.7L Complete emissions delete with an H&S Mini tuner installed.
My truck started missing and cutting out. I know a good bit about engines and knew if was a timing issue. It eventually threw a Crankshaft position sensor code. I replaced the sensor with a new Motorcraft sensor. No change. As soon as you give it any throttle it falls flat on its face. I was lost, took it to a Diesel performance shop. They had it 3 weeks. In that time they changed the sensor again, replaced the pig tail connector that plugs into the sensor and nothing. They scoped the tone ring on the flywheel and said it was there and in good shape. While in there they noticed a sensor laying in the bottom of the bell housing. Said someone tried to install one and dropped it at one point. Not sure if relevant to my issue, but trying to be detailed. After all that, they gave up and said take it to Ford. So I did. Ford checked everything and said the sensors and injectors APPEAR to be functioning properly but it is losing timing for some reason. They "turned off" the tuner and made no change. Contacted ford in Detroit and was told to run a new wire for the crankshaft position sensor. They did and that did not fix it. They are lost and ready to give up. Anyone!!!! Please help.
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post #2 of 49 Old 03-15-2019, 05:07 PM
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Is the tone ring for the crankshaft good?
Is the timing gear/chain/whatever the 6.7 has good?


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post #3 of 49 Old 03-15-2019, 05:11 PM Thread Starter
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Yes shop said the tone ring is good.
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post #4 of 49 Old 03-15-2019, 05:14 PM
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My guess is the timing chain has stretched or jumped a tooth than.

Edit #1 I know the ford dealer gave up but you should contact ford customer service. This is probably something an engineer would get giddy about.

Edit #2 it's gear driven. Check the gears.


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Last edited by powerstrokeshellback; 03-15-2019 at 05:17 PM. Reason: I'm retarded.
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post #5 of 49 Old 03-15-2019, 05:22 PM Thread Starter
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The ford dealer told me they did contact ford engineering. Did everything they advised. The thing is it idles fine so hard to think the timing gear jumped. Thoughts?
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post #6 of 49 Old 03-15-2019, 05:27 PM
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If it idles fine, it's not the gears. You would have bad timing all the time.

It's not fuel delivery or air delivery?


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post #7 of 49 Old 03-15-2019, 05:30 PM Thread Starter
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Dealer said computer shows all injectors firing. Just evver now and then each injector stops. Something electrical stopping them maybe? They said they "THINK" it may be the pcm. 1300.00 guess. Sigh
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post #8 of 49 Old 03-15-2019, 05:31 PM
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What about compression, has that been checked?


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post #9 of 49 Old 03-15-2019, 05:32 PM Thread Starter
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No. No one has checked compression
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post #10 of 49 Old 03-15-2019, 05:32 PM
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Quote:
Originally Posted by rookie12wf350 View Post
Dealer said computer shows all injectors firing. Just evver now and then each injector stops. Something electrical stopping them maybe? They said they "THINK" it may be the pcm. 1300.00 guess. Sigh
Wait, so there IS a fuel issue.

@kaya

Edit: kaya can correct me if I'm wrong but your injectors should not just stop.


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