Join Date: Mar 2013
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What year is your truck? The 99's have had trouble with their factory torque converters. If I were a betting man, and I am, I would say it's your torque converter. This would explain the shutter, and the sluggishness that you are refering to.
99.5 F-250 4x4, 7.3 PS
State 1 injectors from Rosewood, GT38 (van) turbo, S&B intake, Comp Cam's 910 valve springs, Smith Brothers pushrods, AIH delete TS 6-position chip. Pyro.
2005 front end conversion, 2008 tailgate, taillights, and rear bumper.
Edge CTS monitor, and 4" Exhaust (Manufacturer to be determined).