im using the oem dx harness on both the motor and the inside of the car, with the oem LS ecu. i tried to use the oem LS harness on the motor and the car wouldnt start, and i tried using an Si harness and it wouldnt start. i wired the mpfi every works except the car idles at 1500 and when i step on gas it bogs down some. i used the tps and map sensors that were already on the motor. any ideas what else it can be? the ecu is throwing codes 6, 10 and 14. any ideas what they are? can someone please get back to me soon.