Car has Saleen supercharger with new HTO one step colder plugs and new GT 500 fuel pump. Cat starts fine in the a.m. at 30-40 degrees after being parked inside my garage, but after sitting all day in an open air parking lot at 50 degrees, it is very reluctant to start. It turns over, but acts as if it is not getting fuel. It took me 20 minutes to get it started yesterday. It only does this under these exact circumstances and no other time. After it finally gets going, it's OK. Car did the same thing before the new plugs and fuel pump. ???