Is something missing? Or is it just a broken vacuum hose? If so does it loop on itself?

I'm chasing a lean bank 1 code(P0171) on my 03 2.3 PZEV duratec. I've checked all the vacuum hoses for leaks using propane and no change to engine rpm. Looked at o2 sensor voltages, they both seem to fluctuate normally. Fuel pressure senses 40. The stft runs between 0 and 6 BUT the LTFT is...

So I just paid off my 15 focus se 5spd and would like to upgrade the audio. I like the factory system except for lack of bass. I don't need a lot, and would be happy with the factory sub, if I had one. I can pick one up on the cheap, but I've read about having to change the ohms on it for an...

I recently purchased a 2004 Focus with a 2.3 engine. I want to replace the air intake filter. I learned that it located inside the left front wheel well. I managed to disasemble the air intake parts and got to the air box which I assume the filter is located inside. I could not get the air box...