I want to share this with all ppl.My friend using 4g91 d0hc inj engine. But the power reduce drastically if aircond on.Really lack of power.pick up like kancil 660.But if aircond of f, everything is ok. Tuning the engine already and diagnosis it already.that diagnosis device reading all is ok.TPS and distributor also aligned already.Engine idling when on or off aircond also good and consistent.

Hope Anybody using this engine can share your experience here.Thank u...