Fuel trims and oxygen sensors work together to keep the air-fuel ratio in balance for performance, efficiency, and emissions control. Knowing how short- and long-term trims function, along with proper ...

There's a reason more of us aren't professional tuners. Most of us haven't dedicated our lives to making horsepower, improving drivability, or lowering elapsed times. The majority of us can do a good ...

Question: I took your advice and purchased a diagnostic scanner. I’ve been playing with it and trying to make sense of some of the things on the data list. I remember you saying that the “fuel trims” ...