This just started happening yesterday, and its driving me nuts. When I'm idling, I can hear the engine sort of surging, and I can see my tach needle kinda moving along with the sound the engine is making.
Also my dash lights and headlights dim with the sound of the engine too, sort of like when you have your stereo cranked, and the lights dim with the bass.
I haven't changed anything since this happened, I just took a pretty long drive out to see lowell yesterday to pick up some parts...
It sort of reminds me of when my alternator was on the outs, same kind of symptoms... could it just be a loose alt belt? It seems pretty tight to me..
Any ideas?