- 2008 GLI
- 2.0T FSI
- Forge WINTake
- BSH PCV fix
- Unitronic stage 2
- MIL is on:
- P2187: System too lean at idle
At first I thought this could be spark related. Changed the plugs (OEM NGK copper to NGK Iridium IX) and the issue appeared to be solved. However, I now know that this is happening once the car has been driven about 30-40 minutes. Symptoms are:
- Boost peaks at 5 psi
- Slow acceleration
- Loss in fuel consumption
The first thing I checked was the newly installed Forge WINTake system. I wanted to make sure it was all proper and nothing had expanded or slipped after installation. All clamps are tight and all silicone are properly seated. Also, the mass airflow sensor is properly seated.
The second thing I checked was the mass airflow sensor. I had swapped that with a known good sensor and had the same issue. I was then going to run some VCDS logs to see if the fuel was within spec from the HPFP. Before being able to do this, I did a lot of searching and kept finding the same answer; PCV system.
The one thread I read had the same issue but was running the BSH catch can setup. I am running the BSH PCV fix (block off). There was a small leak with his plate allowing air to enter. He also had a lot of blowby in his lines and plate even with a catch can. This afternoon, I pulled off my block off to inspect the gasket and ports. No blowby at all and no uneven compression of the gasket. Also, the case ventilation hose was replaced in June. I reinstalled everything and had to go to work. No dice.
So I am back to the drawing board. I have some options:
- Pull off rear PCV tube and remove check valve if present
- Log fuel trim via VCDS
My confusion comes with the fact that most of these parts have been installed on the car for a while and only now displaying an issue. The BSH PCV fix was installed in February and the HPFP sensor recall was performed in April.
My anxiety comes with the fact that I only have 3,000 miles of warranty left and if it is a covered part, I would like to have it taken care of.
Any input would be greatly appreciated.