I think its a PCV valve problem. Its cheap part, but its verry important for a this car.
The pcv is under the intake manifold on backside if it is leaking it can cause a high idle but i would check th ecar over for vacuum leaks as this is common as well
I HAVE A 1999 SEBRING CONVERTABLE AND WHEN IN PARK OR NEURAL IT'S IDLING AT 3000 RPM'S AND RUNS HIGH RPMS DURING DRIVE AT STOP SIGNS, DO YOU HAVE ANY IDEAS IT HAS 115,000 MILES.
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