Tuning your engine with the aid of an air/fuel meter can really help you dial in your carburetor. But what numbers should you aim for? When people talk about the air/fuel ratio of their engine, do you ...

Where does the ideal air/fuel ratio come from? What makes 14.7:1 the ideal air fuel ratio for gasoline combustion? This video ...

For any engine to reach its maximum potential, the fuel must burn efficiently. Running rich or lean is not good for performance, and in extreme cases it can be catastrophic. A rich engine is likely to ...

High bandwidth control of the air-fuel ratio is necessary in order to minimize the exhaust emissions of sparkignition engines with three-way catalytic converters. A new approach is to implement a ...

As performance enthusiasts and racers work with more sophisticated tuning tools—especially those designed for EFI engines—there's a growing debate on whether to use air-fuel ratio or Lambda in the ...

Editor's Note: As inanimate as intake manifolds may appear, they provide a path to both major and minor on-track power gains. Selection is one thing; "tuning" them to specific applications is a blend ...

Owners of 2007-09 Honda CR-V models may come into your store with the Check Engine light illuminated and one or more of the following trouble codes stored in PCM memory: P0134, P0135, P0171 and P1157.

Mazda’s new SkyActiv-X engine will go against every convention you thought you understood about gasoline engines. It’s supercharged, but for efficiency purposes, not to increase power. It has a ...

It's a common misconception that modern fuel-injected engines are more immune to flooding than older carbureted motors. Given the right (or wrong) conditions, any internal combustion engine –- whether ...