Hi I just purchases an Ultrasport Avant with this K04 turbo kit already installed and there seems to be a problem. I don't believe its a problem with this kit. Hopefully someone will know a direction to go.
Heres my problem.
When I bought it and drove it home 1,000 miles it seemed to run fine. It would boost to a consistent 15psi and hold which since I just bought it and didn't know a whole lot about the kit i figured it was normal. Now that i am home and have been driving for over a week other things are now happening. First let me mention how gutless this car feels in the lower RPM range. Feels like i have no bottom end torque at all. Been like that since i bought it. Now it only boosts to 10psi but seems to hold that 10 psi. Than after it only would boost 10 psi for a day or so the CEL came on with two codes. First is P0299 and second is P0455. First is a boost code second is a apparently a vacuum leak code i believe. I don't have VAG COM to run logs or anything so i was thinking maybe someone would know what direction for me to go from here?
Could it be a fueling issue? Fuel Filter? etc..
DV? N75? Wastegate?
Ive read similar things saying it could be those but hopefully someone has some insight thank you for your time!