when driving at low rpm up to 4k(in every gear) i hear like a rattle noise(sounds sort of like somthings loose) from the engine. i have looked under the car and have not seen anything obvious that was loose. can this noise be the engine knocking? heres my set up i just got >b18c1 odb1 in EG(95si) >polished crank >CTR over size >over size bored >honed >clean >dected >JDM rods >ITR valuetrain set >New crank bearings-rod bearings all new . >Dc 4-1 header >oil pump- water pump >8.5 wires >ENGINE balanced double check clearance -rods-and main bearings im am currently running a p28 w/hondata. now if it is the engine knocking, can i just use an ecu that looks for a knock sensor? any suggestions will help thanks!