OK the notorious problem on the vanes sticking is the symptoms I have but it has only happened when I go to one particular landfill. My question is could the increase in methane from the landfill cause this because it is thinning the air a little? As soon as I leave the landfill I have to pull over shut the truck off for a few seconds and it is fine. It was not dusty as all today either. I just wonder why it only does it in the landfill.