What causes the idle vibration when the air conditioning is turned on in the Elysion?
2 Answers
Elysion experiencing unstable idle when the air conditioning is turned on is generally due to excessive carbon buildup in the engine. This happens because when the air conditioning is activated, the air conditioning compressor increases the engine load, and the engine controls the throttle opening and fuel injector's fuel injection quantity based on standard parameters. More relevant information is as follows: 1. Note one: If there is carbon buildup on the throttle and fuel injector, it will affect the actual intake air volume and fuel injection quantity. Additionally, carbon deposits can also impact the atomization effect of the air-fuel mixture and the air-fuel ratio. 2. Note two: When the engine's idle power is insufficient to meet the load brought by the air conditioning compressor, the idle speed will gradually decrease. When it drops to the limit value, the engine will repeatedly adjust the intake air volume and fuel injection quantity, resulting in the observed phenomenon of unstable idle.
I had a similar issue with my Elysion. The main cause of idle vibration when the AC is on is likely due to the sudden increase in engine load caused by the compressor operation. Normally, the idle speed is already low, and when the AC compressor kicks in, the engine has to work harder. If there's an issue with the ignition system, such as worn-out spark plugs or excessive carbon buildup, delayed spark ignition can worsen the vibration. Additionally, worn engine mounts can amplify the shaking. My car is quite old, and the mounts were a bit deteriorated. Another factor is carbon buildup; a dirty throttle body can affect air intake, leading to insufficient air supply at idle, making the engine even more unstable when the AC is turned on. I tried cleaning the throttle body and replacing the spark plugs, which improved the situation significantly. I recommend starting with these simple checks before taking it to a professional shop for an electronic control system inspection.
