The car has a strong gas odor when driving. It is worse at higher RPM's. There is no obvious leaks, and there are no wet spots under it. I am guessing that the carb is loading up when the accelerator is moderately applied under a load. I'm not a carb expert. Is this possible, is there a way to check for this, and what would cause it? It is a factory reman'd Quadrajet 4bbl that was put on when the engine was rebuilt about 12 years/4,500 miles ago.