Why does the engine RPM drop slowly when releasing the accelerator pedal?
1 Answers
Slow RPM drop after releasing the accelerator pedal may be caused by an overly rich air-fuel mixture in the engine or certain sensor malfunctions. It's recommended to have a technician use a diagnostic scanner to check for any trouble codes in the vehicle, which can help identify potential electronic system issues. Here's some relevant information: 1. The normal operation of a car engine relies on numerous sensors and electronic components. If certain sensors malfunction, it may affect the engine's proper functioning. 2. Common sensors around the engine include the oxygen sensor, mass airflow sensor, intake air temperature sensor, camshaft position sensor, coolant temperature sensor, etc. If any of these sensors fail, it may lead to an overly rich air-fuel mixture condition, causing the engine RPM to remain high even after releasing the accelerator pedal.