Rough running engine - Diagnostic help

[ulfilias]

Hi There,

The two side covers of the belt were one of the first things off. I popped the middle one. The belt doesn't look particularly loose or bad. All teeth seem to be there and perfect. Turning the belt on the starter and the wheels and marks look to be in the right place. I think you would notice one tooth out, let alone 3 or 4. I don't think that it is the belt. It was changed about 60K ago, which is by no means new, but it also isn't overly old either.

Lee