Shakes or Wobbles problem
1994 Hyundai Sonata 4 cyl Two Wheel Drive Automatic 120000 miles

I have a problem with my car when I turn on the Air conditioning or when the fan of the engine is on. The car starts shaking and the RPM goes down (I can see it in the tacometer) I have to press the gas to avoid this but the car never shuts down completely. I scanned the car already an there was just a code 13 or 41, I don't remember, it was something with the inktake...I think this is not the problem. I change the fuel inyectors already. Thank you!