1995 Ford Escort Sport LX

1995 Ford Escort Sport LX 1.9L with 182,000 miles at first problems with the idle, acceleration, were the main issues. When it is at a complete stop, it idles rough, then dies. So, I check the filters, changed them. Still happened. Went and changed the fuel filter, still happened. Then one day, it stalled and did not start, so I go to change the pump, and found out about the inertia switch, I pressed it and it started up again, the problem was still there so I went and replaced the the fuel pump, still happened, I can hear the fuel pump now though, sometimes.

i couldn't use my code scanner because the check engine light was not on, plus it was not maintaining a correct idle, it came back with
---538 ----"insufficient rpm change during dynamic response test or invalid cylinder balance test - cylinder identification problems."

i ran a KOER self test, and I think it came back with
--- code 33 ---"EGR Valve position (evp) sensor or pressure feedback EGR (PFE) sensor indicates EGR valve is not opening or, not seated properly."

And now today, the car started to die, A LOT MORE than it ever has. When I was driving home, on interstate 880, it acted really funny, loosing power, when going at a steep incline in the road loosing a lot of power, sometimes seeming to drive a lot faster than normal, then to loose power while my foot was on the gas, oh yea, my check engine light is now on.
now, I think I need to check my fuel pressure regulator? Where is that?
my relay. Where is that and how do I change it.

i drive auto parts for a living. I try not to ask the guys in the shop to who I deliver the parts to questions about the car, they seem to be to busy or to whatever to help, so I donated some money to get this answered ASAP, my job relies on it!