If I had an obstruction blocking a fuel injector could it come up as lean conditions? I am assuming it would since fuel would be restricted for that cylinder. I have had that error for a couple of weeks. Last month my air filter ripped apart and hit the Throttle Body. I pull it off and used a mirror to see if anything made it through but it looked clean. With this error I was going to pull my injectors and take a look inside right there. I see a lot of people upgrade to 19lb injectors, but I am guessing they pull them off motors themselves saying they got them for less than $100? I looked online and they are at least $50 a piece. I also replaced my O2 sensor not long ago which is why I am guessing that is not the problem.
Complete rebuild axle/engine/everything swap in progress:
Parts already gathered for assembly: 2001 Ford 302, 1990 Mustang GT 5.0 ECU and wiring, NP435, NP205, Pair of axles from 04' F350 SuperDuty (Sterling 10.5 Posi rear, Dana 60HP Front-Both Disk Brakes 3.73 Gears), 37" H1 Tires, 9" lift TJ Coils for 2 link conversion in front, Stage 2 Clutch Kit, 3 Row Aluminum Radiator, Chevy Astro Steering box (4" front Stretch), XJ Rear Leaf Springs (6" Rear Stretch), and lots more.