Surging

[Rickilove]

Jeep surges between 1700 and 2200 RPM when cruising between 30-45 miles per hour. strong acceleration when in lower gears and when accelerating.
new MAP sensor, TPS, fuel filter, IAC sensor.
cannot seem to eliminate.
any suggestions?

 

[Gilaguy23]

Fuel pressure to low?? Tune up parts good and no funky "snake oil" parts installed recently? No Kriptonite spark plugs er nothing??