Turbo issues - Ford Powerstroke Diesel Forum
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post #1 of 3 Old 02-03-2014, 05:24 PM Thread Starter
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Turbo issues

Hi, my truck runs great until it gets up to temp and I come to a stop. When the truck is up to temp and I get on the throttle the vtg stays at 85, meaning the veins are stuck closed, why does this happen when truck is up to temp, sometimes truck takes off ok and other times vtg stuck at 85 and sluggish. I know the veins are stuck closed but why intermittent . Any thoughts, it's driving me nuts, what would cause this.
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post #2 of 3 Old 02-03-2014, 05:35 PM
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You're actually watching commanded VGT not actual. These trucks do not have a vane position sensor like the duramax counterparts.

So in theory if your truck is commanding 85% VGT all the time then the PCM is not seeing the exhaust backpressure it wants to. Too little back pressure would cause the PCM to want to close the vanes to gain more, this would be to decrease lag and promote EGR flow. Sounds to me like your vanes are actually stuck open which would create a sluggish lag on take off.
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post #3 of 3 Old 05-20-2014, 03:43 PM
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I was told today by a Ford Tech that my turbo is stuck. He's claiming six to eight hours to clean it or a reman turbo replacement. It runs ruff until it's at operating temps, then it's fine. Boost gauge seems to be functioning okay, but he said I shouldn't run it in this condition. Problem is I need to pull my camper this weekend. I can probably do it with my Expy but it's only a 302.

I've read the short explainations of this, but is there serious danger with this until next week?!
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