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youre being to technical robo . but if he uses his pcm is is still a pcm if he doesnt use the bcm or tcu part of the pcm? or does that make his pcm a ecm?but the egr is only activated once his temp get at a set point his tps is steady and his speed it at the set point. so with out a vss it wont know what speed hes at and shouldnt activate the egr. his tcc wont matter without a auto trans