The flaps are fully open during higher load conditions to maximise volumetric efficiency and power output. The swirl flaps are a poor design, they are prone to failure. When the swirl flap breaks, the debris falls into the engine, either sticking in the valve port and jamming it open, causing the piston to collide with the valve, or falls into the cylinder itself causing the piston and head to become damaged.
There are no associated symptoms. If the swirl flaps have failed it then an engine rebuild will be required.
There are no associated fault codes with these symptoms.
I6automotive has manufactured a cost effective solution. Blanking plugs that will replace swirl flaps and leave your engine running just as it was before.
X1 Swirl Flap Blanks 1 needed per cylinder
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