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International Automotive Technicians Network
Re: T444e low power on takeoff
Posted to HD/Fleet Forum on 2/20/2012

Since you're in Texas, I wouldn't expect it to have a EBV (backpressure, aka "warm up" valve) at the outlet of the turbo that blocks off exhaust flow to speed warming of the motor.

This valve is closed based on intake temp, engine oil temp and EBP readings. ... Login to read more.