Thanks guys, thinking about it.. it ticks over at such low revs when warmed up (about 600 if I recall) that I wonder if the idle can be adjusted.
Yep - turn on your aircon! On mine (09 'Max) it resets the idle tickover to the cold-start value of 900ish. Presumably the ECU can sense the increased load of the compressor pump - I can't believe Morgan wired the aircon switch as an ECU input, but maybe the BMW loom does have this as standard?
