3.0 tdi quattro 2008. Had fault code for low maf . Went and had a look at both manifold flaps. When ignition is on 1 side is up and 1 side is down. Is this normal operation? When I start engine it's the same. Can some kind soul maybe have a look to see if theirs is the same. But I suspect faulty left manifold operation as right manifold was replaced at audi a while back. Question. Can I remove arm and keep it open? Do both? Bit of help appreciated here Ps: when engine running and blip throttle 1 goes up the other goes down.kinda. Is this right operation?