Thursday afternoon my fan bracket bearing went out. I was extremely lucky because I was in a parking lot idling at the time. The radiator and fan were not damaged. I removed the belt and drove it slowly home (2 miles). When I parked at home I noticed the engine was loping. Is this from the accessory belt not being there? Which accessory would cause that? The temp gauge was at normal straight up.

Could be related to the alternator and/or AC compressor no longer being driven by the belt. Either one could be cutting in and out and making the ECU do weird things to engine operation. Just a reminder the AC compressor can turn on/off even if AC switch is not "on" depending on what vent mode you are in.

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Sold to LOST member my 05 Ltd, GDE Stg II turbo + TCM tune, SunCoast TC w. Transgo kit, Steiger window regulators, Samcos, Fumoto valve, 2nd gen filter head with Lub. Spec. bleeder, Hayden clutch & 11 blade fan, inverted spare, P-1 battery, BF Goodrich Long Trail TAs, Etecno1 glow plugs, timing belt at 50K miles/8 yrs

thanks for the reply. I'm curious to see if it corrects itself after I put it back together.

I suspect it will.

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Sold to LOST member my 05 Ltd, GDE Stg II turbo + TCM tune, SunCoast TC w. Transgo kit, Steiger window regulators, Samcos, Fumoto valve, 2nd gen filter head with Lub. Spec. bleeder, Hayden clutch & 11 blade fan, inverted spare, P-1 battery, BF Goodrich Long Trail TAs, Etecno1 glow plugs, timing belt at 50K miles/8 yrs

When my alternator died a couple of years ago, I was about 10 miles from home so I drove it on home with no alternator charging.
When I got home and let it idle, it was loping and sounding weird like it was not happy.
Battery voltage was down to ~9 volts or a little less measured with a digital Fluke meter.
As soon as I replaced the alternator with a new one and charged the battery up with a charger, it started and ran perfect even at idle. The lope and weird idle completely disappeared....

Bet yours does too!

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Supporting Vendor and Moderator of LOST
05 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/wwdieselMount
98 Dodge Cummins 24 Valve

Most likely.

Any/all of them. The belt-driven accessories add a load on the engine (or more than anything, just additional rotating mass), causing engine speed to respond slower to fuel being added/removed. Without the belt, engine RPM can increase/decrease more quickly causing the PCM to have a hard time holding a constant RPM. Basically the belt-driven accessories act like a flywheel.

You're ok there; the water pump is driven by the timing belt on this engine so it's still circulating coolant without the serpentine/accessory belt.