2nd owner of 2005 A/T Rav4. Last week noticed that there was some jerking as if it suddenly brakes during acceleration. Sometimes the jerk is felt once sometimes 3 successive ones with a gap of 3 secs. This happens only in Drive mode and in slow moving traffic. When speed is at 30kph to 40kph and above no more jerks. Also twice I tried to go up a steep incline, could not bring it up. Had to move it back to gain momentum in order to get up. A couple of days later I began to smell gas inside the cabin interior. Sent to mechanic the other day and he replaced burnt spark plugs and fuel filter. Didnt solve problem and still persists. Hoping to get some help here.