89 s/c.. car will start for 5 seconds when left over night, after that just cranks. Has gas at shrader valve sometimes... has spark all the time. New fuel pump and filter after install still have erractic pressure.. . Swapped ect and pump relay and cut off switch from working car.. still no go . Spray stuff in TB , runs for a second. Changed DIS , cam sensor from running car .. no difference. Crank bolt is solid. Swapped computer.. same od BS. HELP !!! any ideas would be appreciated. thanks