Have a 02 gt 5 speed 9 psi kb, had it about 4 months been working awsome. lately,not all the time when shifting from whatever gear say 3rd at 5800 and hit 4th hard the car will quit,smell like gas bad. it will not start till i stop the car turn it off then back on and she runs fine again. She dynoed fine with air fuel good at 418hp 430tq. any ideas will help before i take it in. maybe something simple. mass airflow sensor maybe?