3.0 barely runs

[B2_driver]

ive got a 93 ranger with a 3.0. it will start up easy but then starts to miss out. ive replaced the distributor with a good used one, cap/ rotor, wires and plugs with no change. all 6 injectors good used, nothing. the head and intake gaskets are new so no vac leaks. good known ground to the block. brand new pump and filter for fuel. 38 psi fuel. checked MASS AIR meter, IAC, coolant temp, o2 sensors, IAT sensor, all tested and OHMed good. rechecked timing. i dont know where else to go with this thing. any advice would be greatly appreciated and thanks in advance.

 

[RonD]

From what you have checked I would say computer is at fault
Pull it out and open the top
Should look like this: http://www.auto-diagnostics.info/ford_eec_iv

You can see the 3 Blue capacitors in the picture, they can leak and it will corrode the circuit board and cause any number of problems.
You can replace them and clean up the circuit board, or find similar year 3.0l replacement computer, computer must match transmission, i.e. manual or automatic, and EGR or no EGR

 

[B2_driver]

that was my last place i was thinking of trying. its really all thats left now. thanks for the input