|Intake swirl flaps|
This new post reflects a failure registered in the flap motor of the intake manifold used in 3.0 TDi Common Rail engines of the Volkswagen Touareg. They have two electric motors, one for each bank.
The function of these two motors is to configure the spiroid swirls of intake air, depending on the regime and load of the engine.
At low regimes, the swirl valves are closed, improving the quality of the mixture. Between 1,250 and 2,750 rpm the swirl valves open continuously; from 2,750 rpm onwards the swirl valves stay fully open. In start-up phase and in emergency phase the swirl valves are also fully open.
The vehicle responds with some unusual jerks. The engine failure engine light stays lit.