Hello everyone and thank you for accepting me on this forum. here I have a nice 2007 expedition with 138,000 miles I did a huge service on it and I realized that when the engine was under load and I needed power, cylinder bank number 1 did not give.. as if it was running out of fuel. after doing a lot of research with my OBD reader I discovered that fuel circuit 2 was working, it opened and closed when necessary, but on the other hand fuel circuit 1 was in engine off mode! I fear I have a computer problem..what do you think, has this happened to anyone? Thank you for your answers...