E30 318i M40: Misfire and self-revving - symptoms of major induction air-leak

This video shows the symptoms of an air-leak in the induction system, where unmetered are drawn in after the throttle-body causes a terribly poor idle, a permanent misfire and the engine to rev itself gently. The tendency is to look at the ICV (idle control-valve), ignition coil, AFM (air-flow meter) etc., but chances are it will be an air-leak on the induction. In this case it turned out to be a damaged and disintegrated gasket where the lower inlet-manifold mates to the cylinder-head. 

E46 Clubsport: Quick rev and exhaust burble...

Quick rev of the CS as we stave off real work by fiddling with Beemers. It finally has that proper vanos whoosh and exhaust note, though there is still a bit of a misfire / bogging down under acceleration and no fault codes are coming up on Autocom GDP, but DIS will find something and I will post the results. Shame, as this is delaying that front bumper splitter...