You have likely heard of variable valve timing by one of the names manufacturers have for the system, such as VVT-i or VTEC. So what is it and what does it do?

A purge valve is a vital component of a vehicle's evaporative emission control (EVAP) system. Its function is to control the flow of fuel vapors from the fuel tank and evaporative canister into the ...

Most drivers probably don't know what a transmission valve body is, but it's an important part of your car that needs to stay in top shape.

Imagine a valve control system without compromises, one that isn’t crank-driven and doesn’t play by conventional rules. Such an engine would allow infinitely variable timing on all its valves ...

A bad idle control valve can cause a multitude of issues with your car. Check out the Drive’s Garage Guide to identify the signs of a bad idle air control valve.

You'll need to understand how a turbocharger works to appreciate the blowoff (or recirculating) valve.

Evaporative emission control systems (EVAP) are used in cars' fuel systems to prevent gasoline fumes from leaking into the atmosphere. The EVAP system runs diagnostics for possible fuel vapor leaks ...

An article in the Aug. 2 issue of The News reviewed conventional thermostatic expansion valves (TEVs or TXVs) and covered the basic operation of electronic expansion valves (EEVs). This article ...