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Old 05-15-2013, 12:08 PM
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Reduced Engine Power on a 7.3L

I'm new to working on diesels but have a horrible hunch based on codes that are coming up when it's scanned. I started the truck this morning (2008 F350 6.4L powerstroke, not 7.3L like I said in the title) and it had a puff of smoke that I've never seen, then the "reduced engine power" warning came up so I shut it down. Scanned for codes which resulted in P2455 "particulate filter pressure sensor A" (not overly concerned with that one); P252F "engine oil level too high" (big concern since I've not added any oil); P0281 "cylinder 7 contribution/balance (big concern) My fear is that I may have blown the cylinder head gasket some where near #7 which may account for both the balance issue and coolant leaking into the oil causing P252F. Any help on this would be greatly appreciated. My path ahead for now is to drain the oil and check for water contamination. Check the coolant level, If it's a small failure in the gasket I wouldn't expect much transfer but I'll soon see. Thanks again for your time and advice.

JL

Last edited by JLinNM; 05-15-2013 at 05:15 PM. Reason: correct a mistake in engine size
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Old 05-15-2013, 04:37 PM
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You don't have a 7.3 unless it's something really custom. What year is the truck? I am guessing you either have a 6.4 or 6.7.
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Old 05-15-2013, 05:08 PM
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JSchuricht,
You are quite right my friend. Not sure why I was thinking 7.3 but it's a 6.4L 2008 F350 Lariat. No engine mods. I just got the things I need to change the oil. Any thoughts (besides I'm an idiot for not looking directly at the placard that says 6.4L)
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Old 05-15-2013, 05:38 PM
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One other thing to note, I still get the normal info for the particulate cleaning in the exhaust system. So it seems to be doing that job fine.
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Old 05-15-2013, 05:57 PM
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Sounds like you may have a bad set of rings on the #7 cylinder or a burnt up piston. This will account for the contribution code and the engine oil level too high may be excessive fuel dilution. The 6.4s (especially early 08 "job 1" trucks) with the DPF still in place had a tendency to blow fuel past cylinder rings causing the truck to "make" oil.

I hate to be the bearer of bad news, and I hope I'm wrong, but you may have a serious engine issue... Longevity and avoiding these type of issues are the biggest reason people delete and tune these trucks. Also, sounds like something isn't working right on the regens with the DPF codes coming up.

When the truck goes into regen, are you typically in city driving or are you able to keep the truck running at temp for a little while (highway)?
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Old 05-15-2013, 06:10 PM
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I suppose I can do a compression check on #7 to see. The regen is happening way to often I'm finding out. about every the three days, city or open road. It doesn't seem to make a difference
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Old 05-15-2013, 06:14 PM
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You may have an injector sticking open which can cause the piston to burn up, the excessive fuel in the oil, and the fuel not burning properly creates more smoke/soot which can cause it to go into regen too often....
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