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Message: [QUOTE="powerstrokin15, post: 182229, member: 174"] i was driving to class today and scanned over my gauges and saw my back pressure was at 65 crusing 1/4 throttle.. so i floored it to see if it changed. 85psi!! :jawdrop: :eek: i freaked out. so i babied it to school while it averaged around 60psi. i checked the map, it was fine. truck drives and acts fine, though i realize its too high, truck usually doesnt make 70psi WOT. its idling its at 53-55psi. i was in the 345, so i went down to the 75 tune and its the same. i pulled 2 codes. POO6B-backpressure/map related, and P2563-turbo boost circuit low(that was going on a couple weeks ago, my VGT cycles randomly). what's the thoughts? im thinking the BP sensor or MAP... hopefully one of those. truck is still under warranty-so it'll be making a stop at the stealership in a few days since one of our shop mechanics also is a ford tech. [/QUOTE]

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