Went to Proton Edar today at Section 13 PJ and did ECU reset. Most of the jerking problem solved :proud: but I think I still can feel a little when cruising.. A friend of mine suggest me to check the spark plug cable as well? Is there any possibility the problem caused by plug cable? How about fuel pump? It's a 15-year-old car and maybe it is time to change the fuel pump? Any suggestion on this?