Salam,
I am new to this forum. I own a 2006 Liana, no CNG. It has done 65k so far. Two weeks back I noticed slight jerks while driving. Specially in second and third gears. I took it to the service center, got it tuned, new spark plugs, air cleaner, oil, oil filter etc. But the problem persisted. In fact the jerking increased. Today I took it to the service center again. After engine tune up the problem still persisted. The mechanic told me that coils are old and have developed short circuit since some water was found near them. I was amazed since I never wash its engine. Anyway he put double tape near coils and told me to try it out. I did and there was considerable improvement. But the slight jerking is still there. I need your kind advice. What to do? It is really coils problem? Should I get new coils? They are for 26k!!! I thought it could be fuel filter problem. But he said no. Please help out. Thanks