The engine had been running a bit off, so a diagnosis with a MUT II @ Ralliart indicated the stepper motor on the Air Intake Surge Tank was knackered

So I replaced the Engine Air Intake Surge Tank with a newish second hand one from Jappex, but first I gave it a bit of a polish up, this and a good clean of the Idle Control Stepper motor sorted the car out fine.

Thanks to Dave @ Mitsubishi in Cirencester for the use of your tools, workshop, MUT II and expertise