What to Do When the RPM Drops Slowly After Releasing the Throttle?
2 Answers
The solution to slow RPM drop after releasing the throttle is: check if there are any issues with the engine fuel injection system, RPM sensor, or oxygen sensor. The throttle, also known as the air valve, is a control device that regulates engine power. It is operated by the driver in the cockpit via the throttle lever, which transmits control through components such as pull rods, rocker arms, torque tubes, cables, pulleys, and sector wheels to the carburetor or fuel regulator on the engine. The correct method of pressing the throttle is: 1. Place the heel of the right foot on the floor of the driver's compartment as a pivot point; 2. Gently press the accelerator pedal with the ball of the foot, using the flexion and extension of the ankle joint to press down or release; 3. When releasing the throttle pedal, apply force gently, ensuring a light and gradual lift.
I've always driven manual transmission cars and encountered the issue of the RPM not dropping when releasing the throttle. The most common cause is a dirty throttle body, which blocks the air intake and slows down the engine's fuel return. Here's how I do a simple check: first, turn off the engine, open the hood, locate the intake pipe, and feel the throttle body opening with your finger. If there's a lot of grease, just buy some throttle body cleaner, spray it, and wipe it clean. If the air filter is too dirty, replace it as well, as this can affect airflow. Another possibility is a small crack or air leak in the vacuum tube—check for any looseness at the tube connections. Always pay attention to using good fuel to reduce carbon buildup. Safety first: if the RPM doesn't drop, drive at low speed to reduce fuel consumption and address the issue as soon as possible.
