i have a 05 honda jazz. around christmas time, whilst driving the engine would lose power and the yellow malfunction light would pop on. engine would basically go to idling revs, and would not accelerate when pedal pressed. whilst this happened, the engine would sound as if it was misfiring and splutter. by turning engine off and on the problem would go away. my mechanic though it may be the THC or the throttle potentiometer. however he was not sure. the problem stopped with out any repair done, and i placed it down to either the cold weather or dirty petrol.
however this week it has came back with a vengence, 4 times in one trip the problem reoccurred. also today the engine has started to rev by itself. effect is similar to tapping the acelerator, revs go from 1000 to 1500 and back down again. again turning on and off the key resolved this issue.
i have booked the car into a honda mechanic to get it checked, but would appreciate any insights someone might have on this issue. many thanks.