Skip the auto shop - Our mechanics make house calls

Q: car vibrating at idle

asked by on

When I'm driving my car, it feels fine. However, when I come to a stop, it starts shuddering. Having the AC on seems to make it worse. It feels like the car is dying and starting again. One of my friends thinks the car might be losing air when its idling. What do you think might cause this?

A: Since the AC compressor is driven off the e...

Since the AC compressor is driven off the engine crankshaft, turning the AC on puts more of load on the engine. This often intensifies any underlying engine performance problems.

I think your friend is referring to a vacuum leak, which could indeed be the cause. However, there are numerous potential causes for your concern.

The first step is to check for diagnostic trouble codes (DTCs) stored in the car's onboard control module. These codes serve as a starting point for any further diagnostics.

I suggest you have a professional, such as one from YourMechanic, diagnose any DTCs you may have, and repair your vehicle.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Why Won't My Car Start?

There are many reasons why your car may not start. Some common causes include a dead battery, faulty starter or starter relay, fuel pump issues, clogged fuel filter, and computer or sensor issues depending on the year of your vehicle....

Q: Violent surging from rough idle after cleaning throttle body and putting in gas

Hello and thank you for contacting YourMechanic. You may want to perform a tune-up and change all of the spark plugs and wires first. Then check for vacuum leaks on the engine with a vacuum gauge. If the vacuum gauge...

Q: Left wheel vibrate - 2006 Pontiac Torrent

Hello. It can sometimes to be difficult to determine which wheel position (left, right, front versus back) is the source of vibration and thus you could simply have "more" vibration on one side than the other side but still have...

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...