For VW GTI7, Audi A3 8V 2.0, A4 B9 2.0
Fuel injectors do exactly what their name suggests, they deliver fuel into an engine's combustion chambers to be burned. Fuel injectors can cause a whole host of problems that can lead to major engine damage, if not diagnosed and replaced or repaired as soon as possible. A dirty or faulty fuel injector can cause engine problems such as misfiring, hard starting, stalling and hesitation.