Hi. For the last couple days, I have had an idle problem. While at a stop, it idles rough, alomst feels like a miss. I can also feel this happening while driving. This morning, when I got to work, I backed in to a parking spot, and could really feel it in reverse. The engine light came on when I started it up, and the code was for the crank positioning sensor. But, I thought these either work or they don't and it would stall when they go out.

When driving on the highway, I can feel it too. Same thing. Like it's a bad miss. I'm not saying that's what it is, just that it's that kind of feeling.

Any ideas would be greatly appreciated.

2001 4.0L