Ok so I've had my Mk6 GTi 2 years now and for the past year I've had my check engine light on and off along with the EPC light, I've gone through every possible fix, upgrade of coil packs, spark plugs, cam shaft sensor, yet it's still showing the check engine light, and backfiring quite alot! The car is still stock but due for a stage one this week!! I'm desperate for help here as I'm getting worried I have injector failure, I have had it plugged it, showing so many codes and faults including misfires across all 4 cylinders! Sooo I'm reaching out now for some advice and help!