i just got another truck, `97 f-350 with the 7.3L, and was wondering what this control box is in the cab is. it has no markings just a switch and a dial with 6 positions. there is a ground wire and a red wire that leads through the fire wall to the fuel injectors. a buddy said that he thinks it has something to do with increasing the fuel pressure or the timing of the fuel injectors. does anyone know what this is and who makes it?



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