lots of boost with little power and loud turbo surge when letting off??? - Ford Powerstroke Diesel Forum
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Old 02-28-2012, 03:30 PM
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lots of boost with little power and loud turbo surge when letting off???

I just got back from being away for 6 weeks and my truck is acting up. the truck boosts faster than normal and with more boost but seems to have less power on the top end. also the turbo surge is extremely loud and the truck doesnt really want to pick up speed after you are already moving on from a stop. im stumped! i hope my turbo isnt shot and ideas??
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Old 02-28-2012, 03:45 PM
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If it was fine before you parked it and it only did this after sitting then I would guess that the VGT fins of the turbo are stuck. You will probably need to pull the turbo and buff out the exhaust side of it. Do a search on cleaning a 6.0 turbo and you should find all the info you need.
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Old 02-28-2012, 04:11 PM
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thanks man i really appreciate the fast response.... are than any gaskets that need to be replaced if im gonna be taking apart the turbo? or anything i should do while im in there? also would this be a good time to do the 6.4 banjo and the blue spring?
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Old 02-29-2012, 03:01 AM
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Now would probably be a good time to upgrade the turbo feed and drain lines. Both of those lines have been updated to better flowing units. Really the only gaskets you'd need to when pulling the turbo are the feed line gasket and maybe new drain tube o-rings.

You really won't be any closer to the fuel pressure regulator but now would be a good time to do it anyway. And I wouldn't worry about doing the 6.4 banjo bolts. I think it's a huge waste of time and there is no proof that it helps anything.
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Old 02-29-2012, 07:58 PM
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where can i find those turbo feed and drain lines your talking about?
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Old 03-01-2012, 05:17 AM
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Feed line....

Ford OEM Updated Solid Turbo Feed Line # 3C3Z-9T516-A

Drain line....

Ford OEM Updated Turbo Return Line # 6C3Z-9T515-A

Blue fuel spring.....

Ford OEM Fuel Pressure Regulator "Blue Spring" Upgrade Kit # 3C3Z-9T517-AG
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Old 03-01-2012, 11:53 AM
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Good time to clean or replace your air filter as well.
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Old 03-01-2012, 12:00 PM
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Maybe want to get the turbo install kit. It comes with new mounting bolts that can easily get stripped when taking the turbo out.

Ford Powerstroke 6.0L Turbo Mounting Hardware Kit
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Old 03-12-2012, 05:52 PM
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thanks for all the advice guys..... i still have yet to find time to pull the turbo off. it isnt hurting the truck in any way by me running it is it? it also still confuses me how the truck builds good boost but makes no power and throws no codes on the edge dash monitor? like it has no power at all unless you ease into to and then it only has a little power but still builds alot of boost?
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Old 03-12-2012, 07:22 PM
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The only way it could possibly hurt the truck is if it's overboosting. Just keep an eye on boost and try to keep it under 30 psi.

The reason it's not super horrible on driving conditions is because it must be stuck in a mid vane position. 6.0's and most modern diesels use what's known as a variable geometry (VGT) turbo. This is a fancy way to describe a turbo with housing fins. Early "fixed vane" turbos like what's used in a 7.3 are more prone to "turbo lag", which is a condition caused by the turbo having to spool up before making good boost. Most of them had a wastegate as well to limit max boost. A VGT turbo minimizes turbo lag by having fins that change the turbo housing to minimize turbo lag, and control overall boost.

In your case the fins must be stuck in a relatively neutral position that doesn't create to much turbo lag yet still provides good overall boost.
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