Hi, I bought 2010 Mitshubishi outlander sport model( Japan Domestic model) 6 month back. I am facing a major problem for last one month while driving in Low acceleration rpm 1200-1400 speed between 30-50 km there is a notice from the engine which sounds like it can't burn the fuel properly. I have change all plug ,air filter, engine oil ( Castrol 5w -40w) fully synthetic. And service my petrol filter but facing still the same problem. Please help me. Thanks in Advance.

 

Should still be covered by powertrain warranty, I 'd take it to a dealer and have them look at it.