Skip the auto shop - Our mechanics make house calls

Q: My car looses power everytime I start my ac. It almost dies whenever I turn the ac knob in the on possition.

asked by on

Hi, I have a 300zx Twin Turbo. It has 99K miles and run perfectly as long as I do not turn my ac on. As soon as I turn my ac, it will make some squealing noise and the car looses power to the point where it almost dies. Any help would be greatly appreciated.

Thanks!
My car has a manual transmission.

Hi there. It sounds like the AC compressor is locked up. When you turn on the AC or defroster the compressor is commanded on. With the compressor locked up the belt will squeal and the engine will struggle to maintain idle and may stall. Why the compressor is doing this, only a proper inspection can answer. I suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts. Your Mechanic has several available technicians that can assist you with a loud squeal noise when the AC is turned on inspection.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
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 looses power everytime I start my ac. It almost dies whenever I turn the ac knob in the on possition.

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: Car will start and can move into drive and reverse but won't pop into gear

Hi there. In many cases, this issue is caused by a failing shift solenoid or transmission fluid that is dirty or causing an obstruction inside the hydraulic lines of the transmission and needs to be flushed. It's probably a good...

Q: I replaced the tailight assembly but the the brake light still won't turn on.

You will need to do some further testing to figure out where the issue is. This is going to require you trace the power supply from the brake pedal to the bulb. All of the following can be the cause...

Q: Cvt is shuttering on take off from a stop. Forward and reverse. Is it done for.

Hi there. That is definitely one of the signs that the CVT transmission is having issues. However, without a proper inspection it would be difficult to determine if the transmission assembly is in need of replacement or if there are...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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.