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6.4L Power Stroke Engine and Drivetrain Discussion of the 6.4L Power Stroke diesel engine and drivetrain in the 2008-Up Super Duty trucks. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.4L Power Stroke engine.

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Old 01-18-2012, 09:42 AM   #1 (permalink)
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No power but lots of boost

I got a 2008 f 350 140000km on it I had it in my heated shop all day left and it sat outside for 3 hours in minus 30 cold temp. I started it up and went to town and it lost lots of pOwer and at 100 kph it's making 35 pounds a boost? And the turbo sounds different also the engine light is on? Could it be bad fuel? Or is there something bad wrong? Any ideAs would be great thanks
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Old 01-18-2012, 09:56 AM   #2 (permalink)
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I got a 2008 f 350 140000km on it I had it in my heated shop all day left and it sat outside for 3 hours in minus 30 cold temp. I started it up and went to town and it lost lots of pOwer and at 100 kph it's making 35 pounds a boost? And the turbo sounds different also the engine light is on? Could it be bad fuel? Or is there something bad wrong? Any ideAs would be great thanks
Was it plugged in?

Sounds like maybe a some fuel froze or gelled up somewhere, but it ran, and I assumed that it warmed up, so maybe not.

Can you get it scanned, I'm sure we'd be able to help more if we had some DTCs to work with.
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Old 01-18-2012, 10:01 AM   #3 (permalink)
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I'd say a fuel gelling problem.

A simple test might be to see if you can drain the fuel/water separator a bit.
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Old 01-18-2012, 10:19 AM   #4 (permalink)
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O had it sitting in my warm shop all day And I drove it to my buddy's left it outside at his place and 3 hours later I started it and it does this. I put good condeshner in it I don't get why it's making so much boost tho? Like to get to 100 k it's making 40 pounds then set cruzie at a 100 and goes down to 35 pounds. I don't get it any other ideas? Ran so good before
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Old 01-18-2012, 11:54 AM   #5 (permalink)
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You will have to take it in to see if maybe the VGT is stuck.

but check your fuel filters and gelling first before you head in.
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Old 01-18-2012, 12:31 PM   #6 (permalink)
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What is the Vgt? And is it costly?
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Old 01-18-2012, 12:39 PM   #7 (permalink)
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What is the Vgt? And is it costly?
Stand for it is the veins in the turbo...they move to give you more or less boost.

Maybe they are stuck open.
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Old 01-19-2012, 07:08 AM   #8 (permalink)
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I dunno I think it's a sensor cause it only does it when it's cold. When I leave shop in morning it's fine. As soon as it sits outside for a few hours it runs like **** at 100 mm it runs 37 pounds of boost and has no power. As soon As I put it in shop for night next morning it's good again. Then when I go to work and it sits outside again I start it and it does this again. Please help
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Old 01-19-2012, 08:26 AM   #9 (permalink)
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suggest you leave it at the dealer over night. Have them hook up a computer to it and then drive with it cold.
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Old 01-19-2012, 08:36 AM   #10 (permalink)
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What is the Vgt? And is it costly?
Variable Geometry Turbo, meaning the vanes on the turbo have adjustable pitch that the computer controls to fine tune the amount of boost, rather than relying on exhaust pressure alone.

If they're stuck, you can have really high or really low boost issues.

I'd have a dealer take a look at it.

Are you getting any check engine lights? I would think that if the VGT were stuck you'd get a check engine light, since there are sensors that report the vane position to the computer.
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Old 01-19-2012, 12:28 PM   #11 (permalink)
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Ya my check engine light is on. Going to dealer today to get it checked. I hope my powertrain warranty covers this.
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Old 01-19-2012, 12:48 PM   #12 (permalink)
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Should, powertrain warranty covers the engine, trans, PCM, axles, etc.. Take a look here,
Extended Service Plan Details | Official Ford Owner Site
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Old 12-25-2012, 04:45 PM   #13 (permalink)
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I realize this is pretty old but my truck is doing same thing, and my warranty is up, spartan tunes with EGR's removed and intake tube installed.
Any solution I should start with?
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Old 12-25-2012, 04:56 PM   #14 (permalink)
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I realize this is pretty old but my truck is doing same thing, and my warranty is up, spartan tunes with EGR's removed and intake tube installed.
Any solution I should start with?
since you have a tuner...any codes? How about your turbo actuator? Does is cycle when you do the key on?
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Old 12-27-2012, 11:35 AM   #15 (permalink)
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Codes that came up were P2263 and P2563, cleared the codes and haven't come up again but still same issues, warmed up yesterday and doesn't seem to be a problem anymore. I'm going to change the EBP sensor anyway since sounds like this is possibly the problem, just seems odd this only happens when around -30C . Not sure how to monitor turbo actuator.

Thanks
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