The EGR valve is mounted on the intake manifold near the carburetor. In most cases, malfunctions in the exhaust system are caused by a stuck or corroded EGR valve.
On a cold engine, manually move the diaphragm from below the EGR valve. By applying moderate pressure, you should move the diaphragm up and down within the body.
If the diaphragm doesn't move or only moves when applying significant force, replace the EGR valve. If you're unsure whether the valve is working properly, compare the free movement of your EGR valve with the movement of the new valve.
Checking the Exhaust Gas Recirculation (EGR) Valve (Mazda Capella GC)
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This text was checked by: Georgy Afanasyev
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