The engine management light came on my MK5 2006 GTI yesterday with a loss of power. The engine has a whistling sound at idle that sounds like a siren the engine makes a horrible rattling sound like a diesel being revved around 4-5k. The code was cleared (air mass flow) and the car seemed to run a bit better, I drove it home (150 miles) and the light has not returned however, whilst driving the car the power lacks from normal and seems to die off and go flat at around 4000rpm. The car has low end boost just not as punchy as normal. I wondered if it was an air leak but can't explain the horrible rattle maybe the engine not firing correctly or an injector? Any ideas anyone?
