Have this problem with my e46 m56 engine i installed a air injection pump and did not work check for power in the red and white wire where the pump conector, i put a test light there and kills the engine check a dma main relay and is good but i can't hear any fuel pump noise anyone knows where is the fuel pump module in this cars with this m56 rngine, and know how to do a test I apressiats the help thanks guys, best wishes for you and my self lol good day