5K=5000, I hope it idles lower than that .

You need to get the engine checked out and see why it's idling so low. There's a problem somewhere, although you can check the data sticker under the hood and it'll tell you what it's supposed to idle at, maybe the problem is just the shaking, which may just be that it needs plugs or something. There's no screw you just dial up to increase the idle, I'll tell you that right now.

Gilly