It is the engine that is vibrating and it is just being felt in the steering wheel. Can be a vacuum leak, or miss in the engine.
If other things vibrate as well as the steering wheel you might have a damaged motor/transmission mount.
A car's steering wheel will vibrate when driving if the car's alignment needs to be adjusted.
Check pLugs and wires and the vibration my be from brake pads or warped rotors
Check pLugs and wires and the vibration my be from brake pads or warped rotors
get a wheel alignment
the motor mount is bad
Normally it is a tire out of balance. Can also be a bent wheel.
You possibly have warped brake rotors on the front. Or Bad Wheel Bearings.
Normally this is caused by a tire out of balance or a bent wheel.
yes
could be a blockage in your fuel lines.
The power steering system works on high pressure and at idle the pump does not turn fast enough to provide full assist. It requires a higher engine rpm.