Idle Speed Controller - Stepper Motor - EVO 7 8 CT9A - Idle Air Control Valve If your engine idling is going up and down like a fiddlers elbow then this could well be the reason.
Genuine Mitsubishi Part - Special Order from Japan approx 3-4 weeks For an Exploded Diagram of inlet manifold and Throttle body Click HERE Mitsubishi Part Numbers MD628166 MD628318 1450A069