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hey guys my buddy jus got a set of flow tubes from haisley and he put em in today and its a 2000 cummins sport and ever since he put em in it will not idle at a constant speed and we tried adjustin the idle and that did nothin and another problem is it will die when he puts it in gear but its bc of the size of torque converter hes got in it but we were gonna take it to diesel nationals tomm but he doesnt feel safe drivin it so does anyone think they kno what the prob is??? o and when he steps on the brake pedal the RPMs also go down