Ruf pays tribute to a bygone era with a 550-horsepower love letter to the air cooled engine. If you've ever spoken to a ...

More power. It’s what almost every owner wants from their car, truck, or SUV, but the question is how do you get it? T ...

Separating the crankcase from the intake manifold, which is a source of varying air pressure, the PCV valve maintains the optimal level of vacuum in the crankcase to extract the products of blow ...

When the engine is cold, the choke valve, operated manually or automatically, closes the carburetor's air intake to maximize ... changed the way car engines are made. Fuel injection systems ...

Every time a piston fires, a wisp of combustion sneaks past the rings, dragging vaporized fuel and microscopic oil droplets ...

But for now, let's focus on how it can make your car faster ... where the air is evenly distributed into each individual cylinder, into the combustion chamber past the intake valves.

The throttle position sensor monitors how far open the throttle valve (or blade ... position controls the amount of air that flows into an engine’s intake manifold; when it’s opened wide ...