1997 Toyota Tacoma Emission Control System Inspect Cost

The emission control system begins with the evaporative emission control system (EVAP). This systems prevents fuel vapors from evaporation from escaping from the vehicle. Since fuel evaporative emissions are among the most damaging to our environment, this is perhaps one of the more important systems. As fuel evaporates, it is held in a container until it is released into the engine to be used as fuel. Next, electronic ignition systems have increased the efficiency of engines by regulating fuel and air ignition according to many variables. Once burned, air and fuel is released into the exhaust system, but when possible, unburned air and fuel will be cycled through the exhaust gas recirculation system, as the name implies, to be recirculated through the engine and reused. Finally, the exhaust system uses oxygen sensors to prevent a large amount of fuel from passing through the engine unburned, and catalytic converters to reduce the release of specific chemical byproducts of combustion. There are several other components at work, and several other advances in technology that have led to making our combustion engines more efficient. It should be understood that the main goal of the emissions system is primarily focused on increasing engine efficiency to prevent the emission of pollutants.