Q: My car shakes and shakes even more when i turn on my AC

asked by on

My car has been shaking and when i turn on my AC it shakes even more. I would like to know why because i thought it was due to the spark plugs and the coil packs which i changed and it's still shaking. Sometimes the car would stop working and i have to turn it off and restart it in order to work.

My car has 110000 miles.
My car has an automatic transmission.

Shaking with the a/c on can be caused by a number of reasons. The a/c compressor puts a lot of strain on the engine because the compressor is similar to being a small engine itself. When the a/c is switched on, the engine control unit should trigger components such as the idle speed/air control motor, to increase the idle slightly to compensate for the extra drag of the compressor. If that does not happen, then the additional drag can cause a low,shaky idle and even cause the engine to stall. Stalling can happen more often with the a/c on and turning the steering wheel as the power steering pump also creates drag on the engine. Excessive shaking can also be attributed to weak/broken motor mounts as well.

Have a certified technician look into the engine shake to isolate the exact cause.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. My car shakes and shakes even more when i turn on my AC

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Wireless key have good batteries, central lock work very good but suddenly the two wireless keys stop working 2006 Toyota RAV4

Hi there - if both of the known good keys stop working, it is likely the key transceiver in the vehicle has stopped working for some reason. Check for blown fuses, just in case. The Toyota security system software (next...

Q: How do I cancel and resume cruise control?

You may want to cancel cruise control when you are in heavy traffic and then resume it again once you are back in an open area. You don’t have to completely re-set the cruise control if you use the cancel...

Q: Just got tune up now water wont stay in reservoir and its hesistant...

Hello, and thank you for writing in. If the coolant in the overflow tank is being removed from the tank, then the cooling system is leaking. The smoke you are seeing is likely white and caused from the coolant either...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.