Just installed a new RMM intake with heat shield. Took it out for test drive. Why does my car cut off when putting gear in neutral when slowing down…. RPM began to drop below 1000? To prevent the car from cutting off, rpm has to be above 1000. I reset the ECU after completing the installation. My car is a 2003 Lexus IS300 5-Speed. I called RMM tech support and the guy said I had to adjust the throttle screws. I couldn’t find any screw to adjust on the throttle body. Could it be my airflow sensor? Anybody ever had this problem? Thanks.