firstly battery ok, starter ok, throttle body cleaned out twice, new plugs, crank sensor and water temp switch.
Right why is it that my astra starts 1st time when cold and after letting it stand for 10 hours plus??? But once it has been started it is then difficult to get it to fire up again resulting in prolonged cranking.
Also on the throttle overun there does seem to be a noticeable un smoothness to the engine during the off throttle period.
Fly by wire throttle...