If your Car ac is not working diagnosis is jerking when the AC (air conditioning) is turned on, there could be several potential reasons for this issue. The air conditioning system puts an extra load on the engine, which can exacerbate existing problems. Here are some possible causes and solutions:
Idle Air Control Valve (IACV) or Throttle Body Issues: The IACV or throttle body controls the engine's idle speed. If it's not functioning properly, the engine might struggle to maintain a stable idle when the AC is on. Cleaning or replacing the IACV or throttle body could help.
Vacuum Leaks: Vacuum leaks can disrupt the engine's air-fuel mixture, causing it to run rough when the AC is on. Check for cracked or disconnected vacuum hoses and replace or repair them as needed.
