Car Jerks at high RPM

[Supersymmetry]

I have a 95 eclipse automatic non turbo 420A . I have not gotten any mods done to it not even exhaust or intake. When i am taking off from a stop the car is very sluggish till i get to about 1500 RPM and then everything is fine. If i go above about 3500 RPM the car begins to jerk. IT does not seem to be at shift points. I have been trying to trouble shoot it for a while. there is a list of what has been done recently
transmission computer
ECM
fuel filter( both in line and in the fuel tank)
Tune up (NGK plugs and wires, coil pack, PCV valve)
TPS
MAP sensor
vacuum lines have been examined for breaks
car taken to two transmission shops both said transmission was fine
cleaned out pipe from EGR valve to intake
cleaned throttle body
new air filter

I think that is about it. My next step is to take the car to the dealer although i would prefer to fix it myself. any tips would be greatly appreciated

 

[gsxboost19]

change the front o2 sensor. You can check it first if you like

How to Test an O2 Sensor | eHow.com

 

[AllShallPerish]

When was the last time you changed your plugs and wires?

 

[Supersymmetry]

i have change the O2 sensor pretty recently as will as the plugs and wires

 

[AllShallPerish]

What did you gap the plug to?

 

[Supersymmetry]

I cant remember off the top of my head i looked in the service manual and gapped them according to it

 

[AllShallPerish]

Does this happen when free revving?

 

[master jared]

your best bet is to get a fuel pressure test and a code scan from a dealer and they will tell you whats wrong with it

 

[Supersymmetry]

No it does not happen during free revving. I figured i was going to have to take it to the dealer I just have not had the money to do it yet,

 

[2GbTalonGuy]

It could need a good tune up.

 

[gsxboost19]

its got to be timing/spark related. When load is created on the engine, it is harder for the spark to jump the gap in the cylinder that is combusting. It seems that the problem only persists under those high load conditions. correct?

 

[Supersymmetry]

yeah it is sluggish at take off and under hard acceleration