Slow turbo spool & p0299 - Diesel Forum -
6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. 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 6.0L Power Stroke engine.

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post #1 of 2 (permalink) Old 02-21-2019, 06:37 PM Thread Starter
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Slow turbo spool & p0299

Hi All -

So I've been slowly treating a slow turbo boost on my work truck -- it has had a few other issues along the way, which through the help of this forum I have been tackling, so I will try to summarize quickly here:

Truck has is a dog off the line. its a manual tranny and a lot of times I need to start in granny low just to get enough boost to get going. Once I get past first gear, the turbo builds plenty of pressure - up in the lows 20s and the truck feels like it has great power. Only code is p0299.

What I've done:

- Removed and cleaned turbo -- it was nasty, stuck, and the unison ring was worn so I replaced all of that
- Removed EBP sensor and tube - cleaned and replaced.
- Found several leaks in CAC and pipes - installed new CAC & all piping/boots from turbo to intake. This made a big difference in my overall boost numbers, but didn't seem to help the low end

I'm thinking maybe a leak at the y-pipe but I don't see any soot or hear any leaking.

My Map & Baro readings all seem normal.

EBP at idle is 0psi and VGT is 85% which I know is obviously not good as the computer isn't seeing enough boost from the turbo. While driving, EBP goes upend VGT is between 30-65%. As a note, On my other (well functioning) 6.0, EBP at idle is 3psi.

I have a new EBP I was going to try and swap out - but other than that, and searching for a y-pipe leak, any other thoughts are much appreciated!

2006 F350 Dually King Ranch
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post #2 of 2 (permalink) Old 02-22-2019, 12:22 PM
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Try taping a shop vac set on blow to the tail pipe. You will hear any cracks or leaks.

2006 F250 Lariat Supercrew, ESOF 4x4, 18" tires, FX 4, HD Alt., block heater, Integrated Trailer Brake Controller, Upfitters, power rear window, cab lights - delivered 10/25/05

Ford Remote Start; High idle mod; Timbren load levelers, Scangauge II, Blue Spring upgrade, Quick Start 200 amp large frame alternator, 2 batteries January 2010; GPCM replace October 2011; 2 EGR valves; EGR Cooler replaced 12/30/11; Performance Machine & Mfg. coolant filter added 1/2/12; Rotella T6 5W40 oil; turned rotors, replaced brake pads for 1st time 1/7/12 101K miles; GPCM, both subharnesses and all 8 glowplugs replaced 1/5/13 at 118,000 miles; 2 Ford batteries replaced under battery warranty twice, the latest 9/18/2015; FICM power supply board replaced with Dorman board 11/20/13. Coolant flushed and replaced with Prestone ELC 9/27/14. STC fitting 10/19/14; Dummy Plugs 11/8/14; Turbo rebuilt 11/29/14; cold side CAC tube and boots replaced with metal tube 1/24/15; replaced hot side boots 1/30/16.
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