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6.7 Motor Problems 6.7 Motor Problems

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Old 05-27-2013, 10:07 AM
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Angry crank, no start

Took the truck mudding yesterday, went through a pit that was a little borderline. Anyways wheeled for another hour or so and then on the freeway home about 10 minutes into the drive I notice oil temp climbing, caught my eye at 210, 2 minutes later its 230 then 240 and she dies. Almost as if you run out of fuel, just lost power then coasted to the side. Turns out air filter was f'd it was litrrally warped and wet and dirty. So we let it cool down and still mo start. Even at oil temp back to 150 stillcranking but wont fire.

Towed it home. Low voltage from cranking. Noticed oil on the bottom of the motor. Changed the MAF sensor, disconnected batteries for a bit. Now have code P2291 - injector control pressure too low - engine cranking. Checked fuses. Almost sounds as if its not getting fuel. And I wondered if the MAF could sense no air so in turn stops fuel flow. I have fuel flow to the filter under the hood. Had the charger on it, plenty fast crank. Sat all night and this morming went and tried it cranked and ran for about 15 seconds very rough then died and back to the same symptoms.
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Old 05-28-2013, 03:46 PM
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I would be the wrong guy to ask here but I would be real nervouse about that air filter and would be checking to see if it could have sucked water/mud into your intake.
after that i would be worried about water damage to the ficm or something like that but that could be because of my ficm being out right now.

PLUS as I said I am NOT the guy to ask but perhaps someone smarter than myself will be along to correct me and point out something
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Old 05-28-2013, 04:08 PM
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I would locate the source of your oil leak first and also check the connection at the fuel rail pressure sensor...your crank no start/ rough idle sounds very similar to the sensor being unplugged.
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Old 05-28-2013, 04:51 PM
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check the throttle actuator to make sure its not stuck closed. I have heard that some people simply remove the blade fromt he shaft.
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Old 05-28-2013, 04:52 PM
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Dropped the oil pan and nothing but metal. Waiting on approval from deerborne for a motor....

Sent from my DROID RAZR using AutoGuide.Com Free App
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Old 05-28-2013, 06:22 PM
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Ouch..... Any clue what happened?
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Old 05-28-2013, 06:31 PM
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Quote:
Originally Posted by Guardian29 View Post
Dropped the oil pan and nothing but metal. Waiting on approval from deerborne for a motor....

Sent from my DROID RAZR using AutoGuide.Com Free App
I would bet its the rod bearings, that is what has been going on these.
Not sure why you got the low rail during cranking code.
But here is a link to some helpful info on that.
6.7 Powerstroke high pressure fuel diagnostic
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Old 05-29-2013, 03:18 PM
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Quote:
Originally Posted by tekemp View Post
I would locate the source of your oil leak first and also check the connection at the fuel rail pressure sensor...your crank no start/ rough idle sounds very similar to the sensor being unplugged.
see. I KNEW someone smarter than me would be along.
thanks tekemp.
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Old 05-29-2013, 05:29 PM
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Talked with them today. Still havent pinpoited it yet. When I called they were checking the fuel system to see it it over fueled and hydro locked. I just hope I dont run into any warranty issues having the tuner.
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Old 05-30-2013, 11:25 AM
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You'll be lucky if you don't have any issues. GM is pretty stingy on the duramaxes that come in with EFI live or H&S tuners.
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