Why does the car shake and stall when the air conditioner is turned on?

[OAnna]

When the air conditioner is turned on, the car shakes and stalls because the engine idle speed is not increased. The specific reasons are as follows: Automatic stalling at idle is mostly caused by issues with the throttle valve or idle control valve. Severe carbon buildup or component damage in these areas can trigger this fault, with insufficient air intake being the main cause. Solutions: If the car stalls when the accelerator is pressed at idle, the throttle valve, idle control valve, and other intake system components should be inspected first. Additionally, the fuel system should also be considered, including whether the fuel pump is damaged, whether the fuel passages are clear, whether the fuel injectors are clogged, and whether the fuel pressure is normal. The cause of this issue might also be related to problems with the spark plugs or ignition coils. Poor spark plug ignition quality or damaged ignition coils can be diagnosed through a spark test, but this requires the expertise of a professional automotive technician.

[OAsher]

I recently encountered a similar situation - the car would shake violently and then stall when the AC was turned on, which was really annoying. I suspect the main reason might be a dirty air filter. When it's clogged with dust, insufficient air intake makes the engine struggle when the AC compressor kicks in. It could also be due to old spark plugs or a faulty idle control valve causing unstable RPM. It's best to first check the air filter yourself to see if it's severely clogged, and inspect the spark plugs for carbon buildup. If the problem persists, it's better to visit a 4S shop as they have professional diagnostic tools. Regular maintenance focusing on these small details can help prevent potential issues.

[Claudia]

I think the car shaking and stalling when the air conditioning is on is largely related to the engine's load management. When the AC compressor starts, it instantly increases the engine's burden. If the idle control valve is malfunctioning or there's poor electrical contact, it's easy to experience RPM fluctuations or even stalling. I checked the battery voltage and AC wiring and found some loose connections. I recommend first using a multimeter to test the battery's health and also checking the tension of the compressor's belt. It's important to address any issues promptly before they turn into major problems.

[McIsaac]

It's quite common for a car to shake and stall after turning on the air conditioning, which I've encountered while driving. This could stem from some simple issues, such as excessive dirt accumulation in the air filter, restricting airflow and causing engine instability under increased load. Additionally, poor contact in the throttle body or ignition coil can also disrupt operation. It's recommended to clean the filter every 5,000 kilometers and perform regular minor maintenance. If not addressed promptly, driving in hot weather poses significant risks.

[QuinnAnn]

As someone familiar with vehicle conditions, I've noticed that when the air conditioning is turned on, the car shakes and stalls, often due to issues with spark plugs or the battery. When spark plugs age and fail to ignite promptly, the engine struggles to cope when the AC compressor kicks in. If the battery voltage is too low, the high instantaneous load during startup can also cause stalling. Start with simple checks by replacing a pair of spark plugs or testing the battery capacity. If there's no improvement, then inspect the electrical system to ensure safe driving.

[VioletLynn]

I've been driving for five years and have heard friends talk about the issue of the car shaking and stalling when the AC is turned on. The core reason is the loss of engine management control. When the AC is turned on, if there's a fault with the fuel injector or sensors, the RPM adjustment may not be timely, leading to shaking. It's recommended to check the car's computer to read the fault codes and replace the relevant parts accordingly. Don't overlook routine maintenance like filter and cooling system checks to keep the vehicle in good health.