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A bit of theory.
Why do I need it?
Valve EGR (Exhaust Gas Recirculation) or EGR valve helps the vehicle to become environmentally cleaner (to reduce the emission of nitrogen oxides NO and NO 2 , which are formed at high temperatures). Rather than the car, and its exhaust. This product is on a path connecting the exhaust and intake system. His task is to regulate the flow of exhaust gas into the intake manifold.
Part of the exhaust gas enters the cylinder along with fresh air, the fuel is not oxidized by 19-20% oxygen (as it in the air) and less, which leads to lower temperatures in the combustion chamber, which leads to lower NOx emissions.
Why clean it?
What are the signs of needing cleaning valve EGR?
On different machines symptoms may manifest themselves differently. Usually, this power reduction, pull is enough to disperse (in the case when the valve was opened and closed). If he "dried up" in the closed position, the symptoms may be other ... Or maybe it does and does not affect the appearance of the engine. It should be added that the loss of power and failures, can cause a variety of pull is enough not only valve EGR, engine-a difficult thing and the reasons can be many.
The EGR valve on the engine CRDI
If trёhtsilindrovogo D3EA valve exhaust gas recirculation (part code: 28410-27700) is behind the engine on the left.
Valve is shaped like a spinning top, even top him vacuum hose connected.
When you remove the valve cover looks like this: