my acura began vibrating (sounds like a exhaust leak) but when I am turning to the left it all stops. no sound and no vibration

I had a friend watch the engine while I went in and out of gear and there wasn't a noticeable jump. I took it out and as long as I go straight or to the right I get the vibration (like riding in a jeep with knobby tires) but if I move the steering wheel just 10 degrees to the left the sound and vibrations completely goes away. It is not a shaking sensation but a vibration like a electric tooth brush. Thanks for the suggestion.

Oh, I completely misunderstood the situation. That's very likely a wheel bearing going bad. Just raise the front left wheel and see if it has movement in and out at the top and bottom. Then you can slowly rotate the tire to see if you feel grinding.

You are better than you think. It was a left rear wheel bearing and they said both engine mounts were broken. I had them fix the wheel bearing for now. If I repaired both the cost would exceed the value of the care ;-) Thanks for your help!