using VAG-com, with car running, go to Engine-01, then go down to Output Test. It will ask you if you want to start the test sequence. At this point I open my front windows. Then I click next, it goes through a few tests then gets to the intake manifold bank 1, then the car shuts off. This intake manifold bank continues being tested with the engine off and you hear the flaps open and close, there is a mechanical noise that tells you they're operating. The output test cycles on/off for as long as you leave it on that particular test. (I'm afraid maybe later on it cold dislodge built-up crud from the intake into the motor?! Is that possible or am I going crazy?) It runs this intake manifold flap test only on my PD; on the AHU it never had any test like that. I am unsure whether it's cycling the smaller intake ports/flaps or if it's cycling the whole intake, but I do think it's the smaller ones from the pictures so kindly posted. Thanks a lot, btw, to you guys with great pics. Interesting what you find...
How come no smaller ports on the PD150 intake? And why the extra dirtiness? Or is it just my eyes...