Review on Enhance Engine Performance with Denso 1976040 Mass Air Flow Sensor by Jerome Brooks

Powered by 04 FXT 5MT, helps with idle issues and allows for better tuning. I went through ghost hunting and learned this machine the hard way lol. Anyway, new O2 sensor, spark plugs, this part and the coil work fine. In the range of 3000-4000 rpm nothing falls in her face. If this problem or problems occur after replacing a part, perform a learn cycle at idle and drive the vehicle 50-80 miles. Subaru needs to learn and they always learn after 143,000 miles. My problem was that too many resets prevented them from learning. Even if yours is idling, let it learn and drive. If it's really bad, start with fuel/air and spark. If yours is reinforced, check the vacuum lines and buy an access port or Tactrix cable and laptop. I see no point in throwing things at him if you can't see the numbers. Good luck and happy driving!