Hi, I have a 2000 blazer after work , when I leave after my car has been sitting for 8 hours or so, the driveway out of work is on a little hill, and when I go to leave the and get out, the engine seems to almost stall out, it doesnt chug or anything it just gets really low power and then it will kick in and go, the RPMs get really low and I barely creep along for a few seconds and then it gets up and goes, where I park is also on a slight incline, could it just be the gas in the lines receading back the lines from the two inclines that I park and leave work from? Thanks!