Still have hesitation at speed. Jerking on acceleration. Loss of power.

Here's what I've done in the last couple of weeks...

Cleaned the throttle body (it needed it)
New Idle Air Valve (ceased)
New fuel pressure regulator
New In-tank pre pump and sending unit as well as fuel lines to the main pump
New fuel filter
Used but working AMM (not sure if mine was bad. just trying to rule things out)
New flame trap (it needed it)
New wires(bouricord), cap and rotor(bosch) (didn't need them)

No vaccuum leaks
No injector seal leaks

New Alternator (another story)
and belts

So, I almost have a rebuilt '85 240. What else could be causing the loss of power and jerking. I hear a lot of clicking from either the fuel pump relay or ecu. (at the passengers feet) I pulled a few spare fuel pump relays at the junkyard and interchanged them(the white one) but hasn't helped. I must admit that she is running better, not stalling at stop signs or red lights but about 2-3 months ago there weren't any problems.

Please lend me some ideas.

Thanks,
Chris

1985. 240. 230k miles. manual trans. RUSTY.