Chrysler Sebring high engine idle issue reaching 3500 RPM with erratic throttle response on Chrysler Sebring

Some Chrysler Sebring owners report experiencing high engine idle issues, with RPMs reaching 3500 and erratic throttle response. These problems can be attributed to a faulty throttle body, which may cause poor engine performance and unstable idle. Additionally, a malfunctioning Idle Air Control Valve (IAC) can lead to high idle speeds and erratic throttle behavior, often linked to diagnostic codes P0505 or P0511. Owners also note that rough idle symptoms, potentially caused by misfiring related to air, fuel, or spark delivery issues, can exacerbate the situation. A thorough inspection of components such as the PCV system, EGR, and IAC motor is recommended to identify contributing factors. Furthermore, some owners observe that high engine speeds may be the vehicle's computer compensating to prevent stalling, emphasizing the need to check for disturbed gaskets or o-rings post-repair. Warning signs like high RPM while stationary and shaking at stoplights should not be overlooked, as they can indicate serious mechanical problems that require prompt attention.