Make sure the fuel shut off is opening all the way. Mine was doing simular to what yours is. It turned out to be a bad relay.
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97 2500 4x4, excab , K&N intake, 4" exhaust, egt,boost,tranny temp on the pillar, 5 star viskus torque converter, converter lock up, stage lll rebuild, #100 plate, 3gsk, boost 30psi, starwheel forward and Smoke screw adjusted for power
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