Not much. Puwede ngang DIY kung may friend ka na mekaniko. Just bring him pulutan, beer and carb cleaner.

On the carb, the idle-up actuator (the one that makes your engine's idle higher when you turn the AC on, or when the car is still cold (just started)) sometimes gets clogged or stuck.

Kung carb nga ang kotse mo, focus nga on fixing whatever carb problems there are before going to the ground kit. That thing won't make much of a difference if your engine isn't running well.

One alternative to the ground kit is to replace your stock grounding wires (coming off the green pole of the battery) or to trace where they connect to the engine and body. When you've found these "ground" points, unscrew the bolts and sandpaper the body and ground point to remove corrosion.