My Hyundai 1993 Sonata 2.0 Auto GLE is having problems with the Steering Wheel vibrating only when the air conditioning is switched on and when car is stationary in (D) gear.

I find the vibrating can get irritating and on a few times had stalled the car.

It seems (N) gear is fine, no problems are the idle would stay at 1200rpm.

But when air conditioning is switched on and gear is in (D) then the car drop idle to 900rpm and the steering wheel seriously starts to vibrate. Only on a few occasion the engine would stall as the accelerator is depressed.

Please help thanks.

 

Sounds like an A/C problem. Engine revs should not drop 300 revs when turned on. It sounds like something is seizing, or getting tight and then causing a problem with the power steering pump with fluctuating power.