I’ve been back to the dealership 3 times already and they cant figure it out. My car keeps throwing a running rich code and cuts off boost so the turbo flutters and the car won’t really accelerate. Originally they thought it was the o2 sensor replaced that and it didn’t work. Today the service writer said he spent hours trying to find out what it was and couldn’t he said that they drove it and couldn’t recreate it and that the car only had a record of it happening one time cruising at 45mph but even if I clear the code it comes back at some point during my daily 70 mile round trip to school and back. Any ideas what it could be possible something simple that the tech may have overlooked?

 

What codes are you getting? All the codes, not just the rich at idle.