I’ve got a cold start issue. Like a fuel starvation on cold starts, throwing restricted performance and low/high fuel rail pressure bank 1codes. 5.0 gasoline engine. 2011 model. It only does this on cold starts. If I switch off the engine off it will start right back up with no issues, runs and drives fine. I’ve replaced both high pressure pumps and the filter/flange in the tank. Is there another fuel filter somewhere or maybe a check valve?

 

Hi, you're in the X260 forum for post 2015 models. There's a forum on this site for the X250 model where others may be able to help you.