I have an issue with my car I keep getting a. Steady DTC for air fuel mixture in bank 1 too lean I attempted to check for vacuum leaks changed plugs also gave thought to changing injectors, at cold start car has a very rough idle and sometime misfires under load.. Does anyone have an idea of what this could be??

 

Hey, you should check out n54tech.com, the people there are really knowledgeable when it comes to stuff like that.

 

What model and year?