Q: 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” were a ...

There's an old saying in engine tuning that when adjusting the mixture of your engine you can be too rich a bunch of times, but only too lean once. With that in mind, determining the air-fuel ratio ...

An engine relies on two things to run: spark and fuel. Sure, there are a million other things to consider when speaking of engine operation and power, but regardless of the type, size, or brand of ...