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 ...

Last month we began our discussion of emission systems by examining various crankcase and fuel vapor control devices, along with throttle and carburetion equipment aimed at reducing automotive exhaust ...

Long the focus of regulators in their efforts to clean up the air, the automobile has become so clean there are now cases where the air coming out of the tailpipe is cleaner than the surrounding air.

GM has issued a voluntary emissions recall for certain units of the 2021 to 2023 Chevy Express that may have an incorrect Vehicle Emissions Control Information (VECI) label attached. The recall also ...

To most of us, emission control systems are some sort of "black art" devices that have been forced upon us to rob performance and ruin gas mileage, but that's really not the whole story. Air pollution ...