Change the CAM position sensor?

I have giving my truck a compete tune up, as well as replaced the cam sensor. The scanner before said that it was a misfire and 1 and 4 so that lead to the tune up and coil pack change. Now it says that it is running lean-rich on bank one. I am about to pull my hair out this can not be that hard. What am I missing!

Thanks Keith

I got the Tool, rented it from AutoZone ($25.00). Getting ready to go do it now. But have another concern. The original problem that I was attacking was replacing my Fuel Injectors. Okay now the one that I bought from Amazon. State that they are for my vehicle 2000 Ford F150 4.2 v6 2wd. However they are much fatter then the ones that I removed, the old ones seated down in the holes, these ones do not. The bottom o-ring on the injectors can be seen as they do sit on the top of the holes in the intake manifold and the fuel rail does seat down properly on top of them but the rail is the only thing keeping them down. If rail was to be lifted off the injectors would just fall cause they are not going down inside the lower intake manifold. If that makes sense? I put the key in on position and got no leaks anywhere but worried that maybe reason for no leaks may be due to no to having enough fuel pressure built up. As prior to doing all this work I was not getting proper fuel pressure readings at all. What do you think I should do? The injectors should
go down inside the holes right? Just leaving out the top part for harness to connect to?

The new injectors that I am putting in are YR3E-A6A.

Take that back they are YR3E-A4A.

Okay this is where I am at. I pulled the Fuel rail back off to check the seating of the Injectors and the rail itself did push them down a bit, the bottom tips of each one are in the holes. Now on the Synchronizer I rented the tools there were 1black, 1 yellow, 1 gray and I think 1blue. Anyways I used the Gray. This is all I did though please tell me if I need to do more or if it is Good. Okay I removed the camshaft positioning sensor and tried each color tool, not any of them went on it so I put the sensor back on and then I "loosened " the large bolt and Washer and just turn the whole Synchro and housing slightly until I got one of the tools to fit down on it properly (which was the Gray one. I then tightened up the big bolt and put the sensor back on it.. I never attempted at all to lift the Synchronizer out. So is that okay now? Do I need to do anything more to it? Am I now TDC?

Okay, so what you're saying is what I did with the tool didn't really do anything that I need to still turn the crank by hand and take out the number one spark plug and make it a go to top dead center on the engine and then I need to remove the EGR again and all that stuff again and the crankshaft position sensor and time the synchronizer again unseeing the tool? Right? Now can I do it like I did before by just moving it or do I have to literally cut out the synchronizer to do it I'm afraid I'm going to lift it off the oil pump? And as far as a tool goes long as I get one of them to fit on there like it supposed to would that be okay or does it have to be specific color no one?

What I meant to say above was that do I need to pull out the synchronizer not cut out to synchronizer or can I just move the whole housing by listening to big nut and bolt until one of the tools fit?