1992 Pontiac Bonneville fuel pump grounding problem

How long since a tune-up? Check for any applicable trouble codes. You should be able to check for mil codes, yourself. When the problem occurs, if it cranks good but won't start, have a helper crank it, while you visually check for spark at the plugs. If you have spark everywhere, use a gage and check fuel pressure.

To check for spark, you can use a known good spark plug or spark tester, keep it in your glove-box. You pull a spark plug wire, stick the tester in the plug boot, ground metal part of tester to metal part of engine, watch for spark engine cranking. If you have spark everywhere, use a fuel pressure gage, some of the national brand autostores used to loan out a fuel pressure gage, if you don't have one. Be careful about gas spraying on a hot engine, let it cool, a little.