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Old 01-07-2014, 11:17 PM
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Cylinder 6 contribution code

So I was driving down the highway in od and I leaned into the throttle and I noticed a bad vibration. Checked codes came up cylinder #6 cont code, drove it home assuming injector issue. Fired it up next day o drive to neighbours shop to asses the situation, started ok. ran rough though. backed out into street and when i put into gear it stalled, and barely started. once i got it running I idled ok still missing, as soon as I put it in gear it wanted to stall, mnaged to get it two blocks to the shop, opened hood and there was oil and seemed like fuel (hard to tell) on top of engine and blowing out of dipstick and inside of intake from ccv. I thought it was an injector issue. But could it be a engine issue? in the morning the day before it happened it ran and drove around fine. Just kinda came outa nowhere if it was mechanical failure I think it woulda happened while reving at least...
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Old 01-08-2014, 05:29 AM
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This might be from far left field, but the only time I know your crankcase gets pressurized like that is if you've got a hole in your piston . That'll be the first time I've heard of it on a 6.0 though..can you do a compression check just to rule it out?
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Old 01-08-2014, 07:29 AM
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Quote:
Originally Posted by nighthawk285 View Post
This might be from far left field, but the only time I know your crankcase gets pressurized like that is if you've got a hole in your piston . That'll be the first time I've heard of it on a 6.0 though..can you do a compression check just to rule it out?
This is my fear, but it doesn't make sense just because of how it came about, wouldn't it come on while the engine was being pushed to the limit? not just cruising down the highway? Is it possible that the injector could fail internally and feed fuel into the oil causing excess fuel and oil to vent out ccv and dip stick...
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Old 01-08-2014, 07:51 AM
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Yup sounds to me like a cracked piston pressurizing the system.
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Old 01-08-2014, 09:19 AM
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Yes I guess I am comin to terms with this...fak!
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Old 01-08-2014, 09:48 AM
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Its not unheard of in a 6.4. This is the first i have heard of in a 6.0.
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Old 01-08-2014, 10:10 AM
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Customer brought one in with a miss fire and smoke. Found out it was cylinder 5. No compression pulled injector and tip was partially missing. Pulled cylinder head and the injector acted like a torch, cut a groove thru the piston and almost cut a hole thru the cylinder wall. It was pretty interesting.
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Old 01-08-2014, 11:50 AM
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Injector looks good, tried to scope it but it didn't fit in injector hole. Could it be just a broken ring?
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Old 01-08-2014, 12:09 PM
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Possible, do you have access to a compression test adapter? If so you can put air pressure in the cylinder to see if it's going the the crankcase, down the tailpipe, or out the intake. Either way sounds like the engine may need to come out.

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Old 01-10-2014, 07:48 PM
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Pistons cracked says snap on boroscope
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