Turbo? Valve Seals? Heck I don't know. - Ford Powerstroke Diesel Forum
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Old 02-22-2013, 05:19 AM
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Turbo? Valve Seals? Heck I don't know.

I have a 2004 F350 reg. cab dually 6.0 auto with 80k miles. I bought it in May of 2012 with 72k miles. Drove it for six months without issue. Everything still seems great except about October last year i started noticing at my normal cruise speed of about 73mph every so often I'd get a quick 1/2 second power loss. I also noticed each time this happened a single puff of blue smoke would come out if the tail pipe. I'm new at this diesel thing so my first thought was its blue smoke so it has to be oil. Thought maybe the oil was getting in the turbo somehow. It was due for an oil change in November so I changed the oil, oil filters and fuel filters. The problem of the occasional 1/2 second lag and puff of blue smoke at highway speeds remained the same except the blue smoke is much less apparent and also now after sitting for a couple hours or more the engine puffs out blue smoke at startup for about 15 seconds as well. To me that sounds like it would be valve seals. But I am baffled by the lag and puffs of blue smoke that happen only between 70 and 75mph. At 65mph cruise and 80mph cruise it runs like a new truck. Any ideas what my problem is? Could the oil at startup be related to what I think may be oil getting in the fuel through turbo on the highway?

Last edited by _keoni_; 02-22-2013 at 05:49 AM. Reason: Wording
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Old 02-22-2013, 05:46 AM
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Also I forgot to say if the truck sits for a couple days or more i get no blue smoke at all on startups.
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Old 02-25-2013, 02:39 PM
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Yep I know its a tough one but maybe somebody here has an idea so ill try again and bump it up.
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Old 02-25-2013, 02:44 PM
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I know ford made a baffle kit that goes under the intake elbow to help keep oil out of the intake. When your say loosing power what do you mean exactly? Are you loosing boost or the engine rpm drops?
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Old 02-25-2013, 11:00 PM
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start by scanning for codes using a device capable of reading manufacturer specific codes.
if none present, check your ficm voltage. if that's good, check fuel pressure. if that's good, you need to run, or have run a cold start power balance
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Old 02-26-2013, 03:43 AM
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Well I'm not sure if the boost drops I don't have a gauge but it almost feels like the engine shuts down for a fraction of a second.
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Old 02-26-2013, 05:20 AM
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The RPMs do drop for that fraction of a second. I don't have a code checker but I did have it checked at a shop back in November shortly after the issue came up and it was clear of any codes. I have had no engine light come on either.
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Old 02-26-2013, 02:35 PM
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Get some type of monitor like an SCT or Torque App, etc. You need to know what your ICP, IPR, VGT and FICM Voltage is. Knowing these will help troubleshooting a lot.
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Old 02-26-2013, 02:53 PM
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Turbo? Valve Seals? Heck I don't know.

Also see I you can view the vgt learn pids. I had my truck unable to learn vgt and would drop boost for a few seconds while accelerating into the highway. It won't learn if you have any air leaks on the intake or exhaust side of the engine


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