What is the reason for the functional failure of the inflatable sport throttle cylinder 1?
2 Answers
It is caused by excessive fuel injection. The possible engine faults include the following three points: 1. Difficulty in starting the engine: If oil is found seeping from the throttle shaft, check whether the choke valve is closed. Open the choke valve. If it still fails to start, remove the spark plug and check the spark plug electrodes. If the electrodes are wet, blow dry the gasoline before restarting. 2. Unstable engine operation after starting: If there are popping sounds from the muffler and black smoke, and oil seeps from the float chamber gasket, tap the carburetor cover near the fuel inlet needle valve with a wooden-handled screwdriver. If the oil seepage stops, it indicates that the fuel inlet needle valve is stuck, causing the needle valve to not close tightly. 3. If tapping is ineffective: Remove the carburetor cover and suck on the fuel pipe joint with your mouth. If the tip of your tongue can be sucked in, it indicates that the needle valve seals well. Further check whether the float is broken or leaking, whether the enrichment device has failed, whether the main metering orifice is too large, or whether the air metering orifice is blocked.
I've worked in the automotive air conditioning repair field for over a decade and encountered many similar cases of faulty pneumatic actuator cylinders. The most common issue is stuck valves, often caused by excessive dust and oil buildup or insufficient lubrication leading to stiff rotation. A failed actuator motor is another problem - if the current is too high, the coil may burn out or bearings seize up, preventing control signals from getting through. Loose or corroded wiring connections can also interrupt the linkage, especially after humid weather when rust forms easily. Minor control module glitches may send incorrect commands, causing erratic cylinder movement. Neglecting routine maintenance like air filter replacement allows dampers to clog, affecting HVAC airflow. Remember that timely cleaning of damper systems and inspecting electrical connections can prevent major overhauls.
