Define "crapped out", usually, they get all crusted up inside, including the intake manifold, try pulling it off and cleaning it out with some carb cleaner, possibly the manifold as well. I can't recall ever seeing one of these just quit working, but I'm sure there has been a few. You will have to dig the crud out with a screw driver in the unit itself and use some brushes, the intake you may have to pull. I need to go out and look at mine to see.