It is when the car isnt runninng or when its cold. havent gotten a read when its 80 c since the car usually stalls pretty quickly right after starting it. to keep the car running I need to hold gas pedal down. What causes a rich mixture? Does the cold start valve play in the picture?
I dont have any of the special tools including mercedes diagnostis tools or lambda and Im bascially shotgunning the cheap parts. THe parts that cost like 300 and up Im not shotgunning.