I had one experience with my gas-fed Innova before. felt an engine vibration, but I can't recall if there was an engine power loss. malapit lang kasi yung casa sa amin.
buong akala ko ay engine support lang ang problema pero nung na check kong maigi ay hindi yon ang issue. once na kasi meron akong experience sa civic na parang ganoon ang problema nya at engine support lang ang culprit.

it turned out that one ignition coil was busted. our SA only suggested replacing the busted part. The age of my Innova at that time was around 10 years old. IIRC, their charges were reasonable.