I replaced bad O2 sensors and checked 12 volts to O2 sensors,cleanened both 10 pin connectors twice,replaced Idle air control,checked alt.voltage output.replaced damaged vacuum lines,sprayed either looking for engine rpm changes,cleaned mass air sensor,tried a mass air sensor thanks to another person being very helpful,checked continuity from block to groung wire from ground wire to chassis from ground wire to neg post.I did all I new to do and felt comfortable doing.I new nothing about fuel inj. when I started but have learned a lot. A carb. system is very simple most times to work on and is all I have every fooled with. Reading your post and trying things was a great help to me,it was very eye opening.
I was begining to think I needed to pull the Ford E cam out and go with another one,I do want everyone to know it seams to be a very streetable cam and can run and idle good.
Unplugging the mass air sensor would give me a good idle but top end was bad.This does not mean it is bad though.I cleaned mine and tried another one,This could be a couple of hundred dollar mistake replacing this unit when not needed.