My 95 gt is missing when I stab the throttle or accelerate hard abouve 4000 rpm. Pulls hard down low. Just had the fuel sensor(?) inside the distributor replaced and been doing that ever since. Is it a timing issue or what? And I also have a strong seems like Kerosene, not Gasoline smell at the rear of my car after parking it? I do have an off road exhaust. Help? Thanks.