Car Repair World

EGR Valve Replacement Safety Tip: Always wear safety glasses when working on your vehicle. Wear other personal protective equipment (PPE) when necessary, for example latex gloves or closed toe shoes. 1 Locate the OBD-I or OBD-II data link connector (DLC). Refer to your vehicle owner's manual for the specific location. 2 Turn your key to the ON position. Do not start the engine. 3 Plug your scan tool into the DLC and follow the manufacturer's steps to read the diagnostic trouble code. Codes between P0400-P0408 are generic trouble codes for the EGR system. Photo may not be specific to your vehicle 4 To test the EGR valve: Remove the vacuum line to the valve and install a manual vacuum pump. Start the engine and apply vacuum to the valve. If the engine idle speed drops, the EGR valve is working. If the engine idle speed does not change, the EGR system is not working. Most engines will stall if you fully open the EGR valve while idling. Photo may not be ...

Emissions Working Of Emission Control System In Car Helpful Information Emission control systems have been incorporated into automobiles to prevent pollution by limiting the amount of partially burned and evaporated gases into the atmosphere. These systems have been efficient in reducing the air pollution caused by automobiles to a large extent. Increased engine efficiency and lighter vehicle construction has also contributed to helping reduce emissions. The different aspects of emissions are tailpipe emissions, life cycle emissions and evaporative fuel emissions. Unspent fuel vapors are known as the main contributors to air pollution. These omitted gases consist of carbon monoxide, hydrocarbons, carbon dioxide and nitrogen oxide. Lifecycle emissions are byproducts which are released into the environment during the manufacturing, maintenance and disposal of the vehicle. These products include volatile solvents such as auto paint and lubricants, manufacturing plant waste...

Egr Valve Working Of EGR Valve  Helpful Information An EGR valve also helps cool combustion temperatures to stem engine detonation or pinging while the engine is under load. The operation of the valve begins while engine vacuum is lowered due to throttle position and declines as maximum vacuum returns (idle.) Carbon can build up along the valve passages so occasional maintenance is recommended. Step by step instructions on how an automotive EGR valve works. This article pertains to all exhaust gas recirculation equipped engines. Step 1  - An EGR ( exhaust gas re-circulation ) valve is designed to lower NOX (NO2) gases that occur in the combustion chamber when temperatures reach over 3,500 degrees Fahrenheit. NOX gases have been proven to cause brain damage in humans, therefore EGR valves have been mandatory on most vehicles since 1976. An EGR valve controls exhaust gases and allows them to enter the intake manifold and flow into the combustion chamber at certai...