i have a 2002 f 150 supercrew with a lighting swap on it,well it started with codes po171 and po174 and p1000 so i started looking for vac leaks and such which have been the problem in the past,no such luck this time.yesterday after i changed the fuel filter again it started running real bad and my fuel air gauge(innovate) started jumping from o2-2.5 and 20.9.also i wanted to find out what my fuel presure shoud be.thanks

 

The p1000 is probably from having disconnected the battery and you need to drive a bit for that one to go away.

So, lean both banks and the a/f's are all over the place. I would clean the mass air meter first, disconnect the battery for a few minutes and try it again. If that does not help, then start tracking the vac leaks.
Fuel pressure should be close to 39 psi with the fp regulator's vac line disconnected and plugged.