Q: Faint pulsating sound during idle

asked by on

After starting my vehicle and driving for less than 5 minutes, I heard my car making very faint pulsating noises at stop lights. A friend suggested that it may be because the heater was on. Is this anything serious?

If the noise you are hearing is coming from the dash area then you may be hearing the blend door electronic actuator controlling the temperature output to the vents. Try to turn off your a/c or heater controls and see if the noise goes away. If it does then this is the noise you are hearing and may be normal. If the noise is clicking or thumping noise then a problem is indicated with the actuator and would need further diagnosis or replacement. If the noise is coming from the engine compartment from the engine, then you may have a problem with the variable valve timing solenoids. The manufacturer just came out with a new technical bulletin for replacing the parts but the parts may not be ready till after Feb. 2016 or later. I would suggest you have a mechanic, like one from YourMechanic, inspect the noise for you to determine if it needs to be addressed and repaired or if this is a normal noise of a component.

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. Faint pulsating sound during idle

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: Hi i have a 2009 dodge journey and it drives great but if you get over 70mph it starts pulsating. What could that be?

Hello, thank you for writing in. 85% of the time, when you have issues driving at high speeds, specially when you can feel them and hear them, you have an issue with your tires. The best place to start is...

Q: Car starts then sputters off

This may likely be a fuel supply issue such as low fuel pressure or a faulty throttle position sensor. The throttle position sensor is a unit used to monitor the throttle position of a vehicle. This sensor relays the position...

Q: The title has "not actual mileage" written on it. Now it is hard to sell. Anyway to have mileage confirmed?

This is something you will need to handle with your local DMV office. Unfortunately, we are not allowed to advise on legal matters related to titles on vehicles.

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...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...