Sr20det extremely lean all of a sudden

[Rocketbunny240sx]

Originally Posted by jr_ss

Your AFR gauge has an wideband O2 sensor. If your gauge is hooked to your factory narrow band O2, that is not an accurate means of measuring your O2 reading. If it is indeed a wideband, you should pull it from the exhaust and do a free air calibration on it, if applicable. Your wideband should be connected to the ecu for feedback, so the engine management can see what your AFRs are doing, should your ecu have some type of auto-tune feature.

I tried to take my o2 sensor out yesterday and ran my car. It richened itself but i didnt try driving with that because i didnt think it was a good idea. Does that mean it was my o2? I tried searching for leaks with carb cleaner and i sprayed it at my hoses like vaccum hoses and all my turbo hoses ect. Idle didnt got up.