It's almost always dirty or bad injectors (but most of the time bad injectors). You should also check the ignition coil (if there is one), wires and spark plugs to see if any of those need to be replaced.

*My Jetta had the same problem, once I replaced the above parts and ran a fuel injector … Read more

If you're using regular 87 octane (cheapest gas), it's more than likely some fuel injectors, valves and intakes valves suffering from carbon build up.

Easy fix for that can be a darn good internal cleaning additive by Lucas or STP.

You might also find Youtube to be your best … Read more