dark scorpion

iTrader: (2)

Ok.

I had another thread labelled "hesitation at acceleration" and went through
a bunch of steps to try to remedy the problem.
Here's what's been done:
New plugs, wires, cap, rotor, icm, coil
new o2 sensor
new egr valve
new map sensor
new iac sensor
new pcv valve
new fuel pump, new fuel filter (second one in 2 months)
Tried to locate and replace as many vacuum lines as possible
Today I got the chance to test the fuel pressure and with key on, ignition off
the pressure was at 40 psi.
With the car started the pressure dropped to 34 psi.
As far as I know this is within specs so what next????
I had another 3rd owner look at it and he instructed me to inspect the injectors. He checked them with his hand and I checked them with my and
the driver's side pulses strong but the passenger's side pulses weaker.
He suspected it might be the fpr but as I found out today, the pressure is
within specs.
So what next? Do I go ahead and replace the fpr, fuel lines, injectors what????????????

I am asking the experts (so to speak).
HELP!!! ( I gotta get this thing running good some time

And thanks guys!!!!!!!!!!!!!!!!!