6.0 diesel miss - Ford Powerstroke Diesel Forum
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post #1 of 21 Old 01-16-2020, 12:26 PM Thread Starter
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6.0 diesel miss

Okay I have a 6.0 with a miss. It has strong diesel odor and white smoke. It has a contribution balance code for cylinder #1. I have pulled the injector to check it for crack and leaks and all looks good. I did run it idling from cold up until it got good and warm and it did not have any blow by at all. Glow plug also looked good. Now here is the kicker it does have a base engine lope when you crank it but it has no blow by so I'm guessing it does not have a ring or piston problem. Just wondering if anyone has had any problem like this. I'm kind of thinking it is something in the valves or the rockers. I know check the compression on the cylinders but I'm waiting on the adapter for my compression tester so it might be a couple of day before it comes in. Any help would be greatly appreciated. Surely someone has had this problem besides me.
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post #2 of 21 Old 01-16-2020, 06:23 PM
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Crank the engine over(or start it) and watch the valve action -- compare to the other valves -- all moving the same?

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post #3 of 21 Old 01-17-2020, 04:20 AM Thread Starter
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Well I have the oil rail off right now but I have cranked it over and everything looks the same. I even cranked it over touching the rockers and couldn't feel anything different.
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post #4 of 21 Old 01-20-2020, 09:36 AM Thread Starter
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I checked the compression and there is very little compression on cylinder 1.
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post #5 of 21 Old 01-20-2020, 08:04 PM
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This is probably a dumb question. But I'll ask anyways.

Did you verify that all of the valves on the low compression cylinder are actually there?

Low compression usually means one of two things. Valves, or rings. If you have a bore scope it would be worth it's weight in gold in this situation.

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post #6 of 21 Old 01-21-2020, 05:55 AM

 
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Originally Posted by rhubbard2000 View Post
I checked the compression and there is very little compression on cylinder 1.
What was your actual compression measurement for cylinder 1?
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post #7 of 21 Old 01-21-2020, 06:26 AM
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What was your actual compression measurement for cylinder 1?
+1 !!!

Troubleshooting over the internet is hard enough - posting numbers helps people avoid making assumptions!!!!
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post #8 of 21 Old 01-21-2020, 07:32 AM Thread Starter
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My compression gauge has a line under 100 and the numbers start at 100. So it moved from the line to half way below 100. I estimate the actual pressure to be around 50 PSI. Sorry about that.
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post #9 of 21 Old 01-21-2020, 07:42 AM Thread Starter
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As far as I could tell the valve stems were still there but it was hard to tell with the rocker on. Im going to try to remove the rockers and see if they are for sure still there. I did notice one of the black plastic pieces on the rockers fell of when I was feeling of the springs to see if they were broke.
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post #10 of 21 Old 01-21-2020, 07:49 AM Thread Starter
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Quote:
Originally Posted by [email protected] View Post
What was your actual compression measurement for cylinder 1?
My compression gauge has a line under 100 and the numbers start at 100. So it moved from the line to half way below 100. I estimate the actual pressure to be around 50 PSI. Sorry about that.
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