turbo under boost and turbo over boost code at the same time - Ford Powerstroke Diesel Forum
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Old 06-17-2014, 04:22 PM
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turbo under boost and turbo over boost code at the same time

Hi there. I am new to this forum. Thought I should join for info advice etc. I have a 6.0 that I have done the bulletproof egr cooler and an oil cooler. Now while towing to pismo the wrench light came on and it went into limp mode. Restarted the truck and it went away for a while then coming back it just kept coming back on. Checked the codes today and there are two, turbo under boost and turbo over boost. Anyone have any thoughts on this? Thanks
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Old 06-19-2014, 09:25 AM
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still acting up?
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Old 06-19-2014, 09:31 AM
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Only when I tow other than when it's cold it is sluggish.
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Old 06-19-2014, 12:50 PM
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I would remove the turbo and check/inspect it. I prefer these two youtube channels for reference on removal/cleaning/installation 1. srmastertech 2. DieselTechRon.

The first time I did it took me about 4-6 hours. I took my time and labeled and photographed the entire process. It looks harder than it is, but some of the vclamps are hard to get to.

You probably have some rusted or coked vanes, a sticking plate. You'll need to break it open and clean it up. You may have a stuck/old/damaged VGT valve as well.
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Old 06-20-2014, 07:45 PM
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Quote:
Originally Posted by Seattle60 View Post
I would remove the turbo and check/inspect it. I prefer these two youtube channels for reference on removal/cleaning/installation 1. srmastertech 2. DieselTechRon.

The first time I did it took me about 4-6 hours. I took my time and labeled and photographed the entire process. It looks harder than it is, but some of the vclamps are hard to get to.

You probably have some rusted or coked vanes, a sticking plate. You'll need to break it open and clean it up. You may have a stuck/old/damaged VGT valve as well.
Good advice here. The codes did not necessarily set at the same time but both conditions would cause the pcm to go into defuel. The wrench light.
Probably a slow to respond turbo. READ dirty or bad vgt.
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Old 06-20-2014, 09:57 PM
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Thanks! Thinking About Doing A New Turbo ANDROID Injectors. Don't want to worry about it.
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