In a performance application at wide open throttle, the ECU needs to control the air to fuel ratio to hit a small target somewhat richer than stoichiometric. The narrowband sensors most OEs use only ...

There once was a time when something called a carburettor was the sole determinant of the air/fuel ratio in the internal combustion engine. No kidding. Ask the most senior member of your staff. He has ...

While oxygen sensors have been an indelible part of automotive technology for decades, the technology continues to evolve. In general, an O2 sensor relies on the fact that when the zirconium dioxide ...

As ever, I am fighting a marginally winning battle against my 1991 Mazda MX-5, and this is the story of how I came to install a wideband oxygen sensor in my Japanese thoroughbred. It came about as ...

As ever, I am fighting a marginally winning battle against my 1991 Mazda MX-5, and this is the story of how I came to install a wideband oxygen sensor in my Japanese thoroughbred. It came about as ...

Back in the Fox days, the most common method of tuning was to increase timing until detonation, and back it off a couple degrees. Like Fox cars, that method was crude, but a dyno wasn't on every other ...

A reliable measurement of the AFR is vital for the tuner to be able to tune the engine and be sure that his changes to the fueling are correct. For this purpose we recommend one of the readily ...