no engine check light comes on or flashes.
check light does work as goes out after ignition switched on.
compression check not able at moment.
what you thinking?
do you not think could be one of many sensors like O2, tps, or even bad ecu
engine does run rich always has done.
would that explain why at cold it runs fine and only when warm does problem start to occur
yeah internally it is.
its just been for MOT and passed its emissions on that