Is the accelerator pedal moving freely? Try stroking the pedal with the engine off and check for any resistance in movement of the mechanism.
Remember, this is a "drive by wire" vehicle, and the ECM only does what the electronic rheostat at the foot pedal tells it to do based on position.
Other possibility is oil (fuel for diesel) getting into the intake or airstream providing the engine with some extra fuel.
If the CAC (Charge Air Cooler aka intercooler) is filled with oil accumulation from the CCV system or a seal in the turbo is failing allowing engine oil to be dumped into the boosted air stream.
Are you seeing any excess black smoke coming from the exhaust when the ROM event takes place? This would be an indicator of excess fuel, diesel or oil.
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Supporting Vendor and Moderator of LOST05 Jeep Liberty CRD Limited
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount98 Dodge Cummins 24 Valve