Has anyone with an a/f guage noticed their car running almost full rich when crusin at 70mph or so? My car seems to do this often, only 2 lights from full rich. The reading on my boost guage is 10in-vac, so there shouldnt be any reason for this. When I let off the gas it drops down all the way, but even pushing the gas just enough to maintain speed I get the full rich condition most of the time. I bet this is why my gas mileage sucks!