My car (Astra LS 1999 , petrol 16V) is running very sluggish from a dead stop until it gets up to speed. There is some hesitation or stutter (whatever it is called) as shift to 2nd gear from 1st gear. So annoying at traffic light or at roundabout. First af all, Im thinking about to clean Throttle Body and Idle Control Valve (ICV) as this forum said.
Do I need to clean them first of all?
Does it sort the problem out?
What else do I need to look for?