An EGR valve helps to improve the performance and economy of a vehicle while reducing emissions by directing exhaust gases back into the cylinders of the vehicle for a second burn. The valve reduces nitrous oxide emissions and directs the warmer exhaust back into the engine, reducing the amount of work required by the fuel-and-air mix in maintaining the engine at operating temperature.Know More
The first EGR valves were simple orifices that directed exhaust gas back into the engine. They resulted in several problems, including difficulty starting, poor fuel economy, rough idle and poor performance. Manufacturers redesigned the EGR valve to use the manifold vacuum to keep the valve closed when starting the engine and open it once the engine reached a certain temperature. Although most engines continue to use the EGR valve to meet 2014 emission standards, some manufacturers are finding options that eliminate the valve while still meeting the requirements.
A dirty EGR valve in an engine affects its performance. Many are easy to clean by soaking in carburetor-cleaning fluid. A vehicle owner who attempts this fix should ensure he does not expose electrical connections to the cleaner. Once the device is cleaned and reinstalled, there is usually a noticeable difference in the performance of the engine.Learn more about Car Parts & Maintenance
To clean an EGR valve, remove the valve from the engine, spray the valve with carb cleaner and put the valve back into the engine. Clean the metering rod if needed.Full Answer >
Before starting a vehicle that has been in long-term storage, check the vehicle for leaks, replace the fluids and squirt oil into each of the cylinders. Charge or replace the battery and start the car. The process requires a couple of days.Full Answer >
Putting mothballs in the gas tank does not improve a car's performance. That was not always the case, though. Gasoline used to have such a low octane rating that adding napthalene, which was the active ingredient in old mothballs, did in fact increase the octane rating.Full Answer >
A true dual-exhaust system helps to improve the performance of a V-6 or V-8 engine by splitting the exhaust from the two banks of cylinders. However, it is less effective on smaller vehicles that use an inline four-cylinder engine. The system reduces the pressure to expel the exhaust fumes, allowing the engine to send more energy to the transmission.Full Answer >