My 1992 750ss XI will run for a few seconds and then shuts off. It will only run for a few seconds if u put gas in the pistons an then it will shut off. It must not be getting any gas but i dont have a clue how to fix it. The fuel pump is fine so i dont know how to fix it. It has been sitting there for 3 years in storage and i thoguht i had it running and now it wont work If anybody has any sugestions i would really apreciate it.