seems like an air-locked gas tank (remove gas cap as a test) or dirty fuel filter....
SOURCE: 1999 Chrysler Cirrus Lxi 2.5l high rpm
The throttle position sensor may be misaligned. This tells the computer how much throttle is being applied, and when they go bad, or come out of alignment, the idle tends to get up there. If that's not the issue, remove your air cleaner, the housing and everything until you get to the MAP sensor. Give it a good spray with carb cleaner, let it dry and replace the air cleaner with a new one. If the MAP sensor detects minimal air flow, the computer jacks up the idle to compensate.
SOURCE: 1999 chrysler cirrus
Check the coil packs, or the Ignition module. Disconnect the harness to the ignition module. And test the leads to see if there is current. I don't know what the specs should be, but it will be minimal. Never overlook fuses either.
SOURCE: cooling fan switch/or sensor
The Coolant temp Sensor is located right under the top radiator hose (on the engine side), with a little black connector!, You might have to remove th etop hose to get to it with a deep socket and extension!.
Also Dont Forget to blled the coolant system by the bleeder valve uptop right near/above the coolant sensor!.(10MM Mini socket w/ extension IIRC!)
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