DEAR CAR TALK: I have a 2002 Jeep Wrangler Sport. It's in great condition, but after a few miles on the road, it starts to make a "teapot" whistling noise. When I press on the gas, it goes away, but ...

Viewer-submitted questions for The Car Doctor: Q: Our 2011 Volvo XC70 has been showing the check engine light on and off for months. I took it to a local shop, and they changed the spark plugs.

Q: I will be bringing my 2006 Ford Explorer into the shop next week for a brake issue. I am hearing a whistling noise from the wheels until I step on the brakes. When I step on the brakes, my steering ...