My problem was with the elbow, also. I went to the dealer to see how much the part was there (the dealer is closer than the nearest Autozone or similar) and he came out with some assembly that had elbows on it that looked nothing like the one I was trying to replace. Maybe that was for the Job 1 ST and I have a Job 2? Mine looks exactly as above, cracks and all.
I went to Autozone and found an elbow that seemed the best fit and put it on, adding some clamps to keep it secure. Does anyone know what the actual Ford part number is? I'll try to post the part info for what I used from Autozone later. Is there a place to get a "true" replacement? I used the clamps since the elbow used did not have the molding that grabs onto the lip on either end when installed.
Update: Did a search including message body the second time and found a thread that has a part number. Adding the codes here so this message comes up in the searches, too: P0171, P0174, System Too Lean