Thanks 4 a reply… actually i asked my mechanic that my car pick is not good and it doesnt accelerates when i press accelerator . he checked all the tuning stuff like tappet , plugs and fuel adjustments and at last he remove the timing belt and move the cam one step forward from the arrow direction mentioned, towards the bumper. and the he again put the belt . he sets the timing on 18 and iam confused that all these changes would not effect badly my cars engine.