i'm after a bit of advice if anyone can help. I've got a X reg (2000) S3 8L face lift model, had it for about 3 years now and touch wood haven't had too many problems with it.
It was remapped (custom code) almost a year ago and was fitted with the forge 007 reciric valve at the same time, approx half a year after having the remap my engine management light came on, when i had it hooked up to vagcom i was told the turbo wasn't quite hitting the required boost level and as a result the engine was running slightly rich which is why the light came on. I was told that it could be a sign of the turbo being on it's way out but to try a different N75 valve, i went for the J valve because i'm sure i've read somewhere that the J valve allows the turbo to boost to a slightly higher pressure, after i fitted this the engine management light turned off and was running fine expect every now and then normally on cold mornings i've got very little boost, the more i put my foot down the less power i seem to have and if i slowly release my foot from the accelerator the more i feel the turbo kicking in, almost as if the more i put my foot down it seems to choke/suffercate the engine (most of the time it runs fine but once every couple of weeks or so i get this problem)
I've again recently had my car hooked up to vagcom (ABS light came on so i thought i'd get it checked out) and these are the faults that came up (apart from the ABS fault code):-
017705 - turbo throttle valve pressure hose
017545 - mixture adjustment cylinder bank 1, rich mixture @ idle
the place where i took it too suggested i look over the breather hoses for spilts which i've done and they don't look too bad (althought they seem very squishy, i don't know if there supposed to be firmer than they are) and also maybe try replacing a temperature sensor.
I've also had a quick look around for boost leaks but i can't see or hear anything obvious.
is this all related to my boost problems? and does anyone have any suggestions on what i could try replacing?