We tested popular wideband O₂ controllers against lab-grade equipment to see how accurate their lambda readings really are under real engine conditions.

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 ...

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 ...

While you could spend a lifetime learning how to tune a carburetor, getting a car running reasonably well with one can be as simple as picking the right carb and bolting it on. Not so with fuel ...

There’s a glut of air-fuel ratio meters on the market, and picking the right one for you and your car is not an easy task. FAST realized during development of its latest FAST Air/Fuel Meter that it ...