- Jun 20, 2017
- 08 135I
I've had a shitty running car since late April. I've replaced many items and since no such luck. My tuner thinks I've got a leaky injector, but those were just replaced back in September with index 12's. Low end performance and gas milage is terrible and drivability too. I haven't replaced my o2 sensors yet at all, but I'm leaning more towards doing that. I did bring it into a mechanic a couple weeks agos and he wasn't successful at fixing things. I'm currently throwing codes 29F4 and 29F5, and while using INPA the following values are off (pics are attached). I'm smelling fuel at idle at the drivers side and the car is back firing. Also, my exhaust tips are burnned black. MHD burbbles are off. What should I do? Buy new o2 sesnors or EGR valve?