groho

I've been seeing allot of threads mentioning air fuel ratios, and the LM1 and LM2 portable testers, narrow and wide band O2 sensors, etc. Can we start a thread to talk about this subject to enlighten and educate us ole-skool dinosaurs. The rough research I've seen shows this is about $400 to set up, weld in, etc. This must be an incredible tuning tool! What about dual exhaust setups? two sensor? Will a scanner read two sensors, or do you read them one at a time? Please,,,educate me.