[Intlhud]

I have a very elusive problem with the check engine light representing a problem in the evaporative system (pressurized fuel tank/loose gas cap). I've had it in to two separate dealers for two full days of searching for the problem, only to get the engine light again yesterday. We've done a pressure test on the system, and a fluorescent dyed smoke to detect any leaks. The gas cap has been replaced. The engine light tends to illuminate when the fuel tank registers just under a half tank. Don't know whether this is coincidental, but it has occurred at that point on the gas gage more than a couple of times. Two dealers have had the car, and both repeat the same diagnostic steps to search for the problem, and the light returns within a few days. Anyone out there with a similar problem? Bob