Hey Danny the symtoms of the erratic check valve was that the idle would kill unexplainably and surge alot. Best to test a little with it off. I beleive Ken is right and a fourmost would work better. Eric alluded to the spring and ball type above but never mentioned a brand. Using check valves with a T and a fuel dot make a slick plumbing job but if it's causing a problem or might in the future it has to be reconsidered. Mike