ZR-1 Net Registry Forums - View Single Post - Please school me on the operation of a 02 sensor

SBAquaLT5 · 03-25-2019

Are you running long tubes? The O2 sensor is designed to work best in a specific temperature range. If the sensor is moved further away from hot exhaust gases, the sensor is not always as effective. Especially when old. This is one reason why emissions states don't like long tube headers.

The sensor operates in a constant sinusoidal voltage swing. Once the engine is running in closed loop, monitoring the O2's, it's constantly going rich/lean and measuring the voltage swing on the O2 to tune itself. When sensors get old, or when cold they don't respond as fast. The heater is designed to give the sensor a boost to be more efficient. Exhaust gas is going to heat them hotter than the heater ever will on its own. But they need a boost to get their quickly.

03-25-2019	#2
SBAquaLT5 Join Date: Nov 2017 Location: Santa Barbara CA Posts: 50	Re: Please school me on the operation of a 02 sensor Are you running long tubes? The O2 sensor is designed to work best in a specific temperature range. If the sensor is moved further away from hot exhaust gases, the sensor is not always as effective. Especially when old. This is one reason why emissions states don't like long tube headers. The sensor operates in a constant sinusoidal voltage swing. Once the engine is running in closed loop, monitoring the O2's, it's constantly going rich/lean and measuring the voltage swing on the O2 to tune itself. When sensors get old, or when cold they don't respond as fast. The heater is designed to give the sensor a boost to be more efficient. Exhaust gas is going to heat them hotter than the heater ever will on its own. But they need a boost to get their quickly.