Guys, i drive a 2002 wira 1.3 Manual...need some advice on my wira problem....
I was cruising @ 120km/h for a minute or 2 on the highway just now...then a car wanted to overtake me, so i let go the pedal and slow down to 100km/h....after that when i try to accelerate, i can't feel the power and still stuck at 100km/h..i try to step more on the pedal but still not accelerating....
After that, my car vibrate when i'm cruising constant 60km/h @ 4th gear, if i try to accelerate, my car will vibrate....the vibration isn't that obvious during 1st > 2nd > 3rd gear...but once i reach 60km/h @ 4th gear, i can feel the vibration...when i'm driving up hill, i feel total loss of power and vibrate even stronger...

the vibration isn't from the steering, i can feel its from the engine...
i'm thinking could it be the spark plug?...but i have just change during the last service and drive 2000km since the last service...but the previous spark plug i change only last me 5000km...could it be the spark plug cable got problem?..or the distributor?...
BTW i'm sending the car for a check up tomorrow...but any sifus here can share your thoughts and experience?...
i was hoping it was nothing serious...