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Probably wheel bearings or wheels are unbalanced

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Q: What causes a hum when driving but not when idling?
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What causes a 2001 vw to shut off intermittently while idling or driving at slow speed?

check the crank shaft actuator?


When idling there is a loud hum until you engage throttle is it a fuel injector?

It could be the fuel pump, if its when you first start the car up


What causes idling?

Taking your foot off the accelerator.


Is there any method used to utilize driving shaft's rotation during idling of the vehicle?

As the vehicle sits idling the driveshaft is not rotating.


Can spark plugs cause car to shake?

Yes, when idling and driving.


Does your car use more gas idling or driving down the street?

It depends on how long you are idling, or how fast you are going. If you know you are going to be idling for a long time, it's best just to put your car in park.


What causes engine noise in a 2003 Chevy Tracker?

In order to tell you that you would have to describe the noise and what the car is doing when the noise is made. Are you idling, driving, just turned the AC on? What is occurring and what is the noise? Idling and sounds worse when AC is on. Sounds like it is coming from the top of the engine. Vehicle has 120k miles


What strategies are there to lower a cars emissions?

Car emissions can be reduced by reducing idling time and by driving at a moderate highway speed when possible. Driving too fast and idling are both wasteful in terms of fuel, and increase the vehicle's emissions.


Ticking noise when idling or driving. It's a 1997 Tahoe.?

It's a 1997 Tahoe


What causes a car vibrate at light stop?

It is idling. This is hard for an engine to do smoothly.


What causes the water pipes to hum when turned off?

choir members in your pipes


Why does your Dodge Durango only overheat when idling but not when driving?

You need to check the operation of the radiator fan.