'93 Bonneville. Ran fine tillshut car off to park. Returned to have dash lights work but engine will not turn over with ignition. Jump starter direct from battery and motor will turn over and breifly fire but then dies. Any ideas?

 

You may wanna try this..access the throttle body. spray some starting fluid (Pontiac Performance Parts) or other combustible liquid of a similiar nature in it breifly while someone cranks the motor. If it seems to want to turn over and run, pulse the starting fluid into the throttle bore enough to keep it running... or not. If it runs, you are lacking fuel. If it doesn't make a difference, it may be compression. If you heard the pump run, then still follow the procedure with the starting fluid, un you can see fuel getting into the throttle bore when cranking.