I don't get a large quantity of cars in my shop, I teach a voc program, but seems like every Chevy thats comes in with a 4.3, 5.0, or 5.7 CPI have these problems. I love the old TBI engines, hate the newer Vortecs for these reasons. I am liking the newer 4.8/5.3/6.0 everyday over the older ones...