Turbo going bad? Losing Boost - Ford Powerstroke Diesel Forum
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Old 10-29-2012, 08:31 PM
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Turbo going bad? Losing Boost

2003 Ford F-350
Sct Livewire, W/Matt's SRL
4" Exhaust
Fass Pump @ 60lbs
A-Pillar gauges fuel/boost/pyro


Truck has been losing boost over the last year, used to spool like 25 pounds....down to 21, then 18, 13 now at WOT I am only spolling like 10-11 lbs. The truck is not laggy, from down low, just seems like it hits a wall where it runs out of air and am wondering if the turbo bearings are going to hell and not allwoing it to spin as it should. I don't know if the unison ring is not moving all the way, but I know it is some for sure.

On the way home did a little run, 20-75 stabbing the throttle and on hit 11 pounds then dropped down to 10 on A-pillar (SCT read out 1 psi less at all times), and also hit roughly 1350 EGTs, which is another reason I believe it is starving for air and has the fuel it needs

I have recently pulled the EGR Valve and cleaned it up fairly well, wasn't as bad as I thought it would be...(even though I believe it is turned off in SCT). I also tried unplugging VGT plug and can tell that there is a big difference.


Any way to check turbo bearings?

Or any other solutions/problems you guys can think of?
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Old 10-29-2012, 09:04 PM
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Did you check for exhaust and boost leaks?
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Old 10-29-2012, 09:14 PM
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My boot, right off the turbo, "shredded" into a webbing like look. It was gradual. It didn't tear like some do. Couldn't see it from the front. It was this way on the back side. Took me a while to figure it out.

Wish I would have taken a picture of the boot.
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Old 10-30-2012, 04:24 AM
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Quote:
Originally Posted by Tuscany View Post
Did you check for exhaust and boost leaks?
I have looked it over, Perhaps there is some way to check it better...but as far as I seen I couldn't find anything...Intercooler piping on both sides seems to move by hand quite a bit but rubber boots still seem like they are holding solid
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Old 10-31-2012, 01:51 PM
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I didn't even remember to pull codes, so today Im not sure what made me think of it but I pulled them real quick on the SCT... Got a P0046, and a P2285

not sure if the 0046 is just temporary, from when I unplugged the VGT, didn't have time to reset, while I was around my truck. Went ahead and order a new ICP and pigtail, so once I get that In I will continue to hunt it down
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Old 11-02-2012, 08:52 PM
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what would cause me to get a reading of -0.4psi at idle on scangauge2? Used to be a positive 0.4bst
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