My Beat has a missfire problem.

At no load the engine will missfire as the revs pass through the 2-4000rpm range. A gas analyser indicates a slightly rich mixture which tends to point at ignition and incomplete combustion.

Out on the road it will missfire at very light throttle at almost any rpm. It feels like a fuel cut as you come off the throttle, then an ignition problem as you go back on or hold. Everywhere else it runs crisply. The caps in the ECU look fine. When I get a chance I'm going to go round with a scope looking at the various sensor signals.