Getting a P1136 (Long term fuel trim add. Fuel, bank 1 system too lean) MIL code.
This is a 2000 Jetta VR6, everything stock.
So far i have changed oil, air filter, checked vacuum hoses and put in a new MAFS (Bosch). The MIL comes comes on after i get off the freeway when the car is idling. Also i have noticed that the RPMs don't stay up when i start cold, they stay above 1k for about 10 secs and then drop to 850, as if the car was already warmed up.
Any input???