94 lesabre starts, immediately stops

[cliffw]

Thanks Steve I had trouble a few years ago that I traced to the antitheft module. After working all morning to try to get at it under the dash, I bypased it. That cleared up the problem. So I don't think that's my problem.
As for the suggestion I don't have the information or equipment, you're right otherwise I wouldn't be asking. However I do have a method to my approach. I also know that other things can cause problems besides what the manuals suggest. That's why I'm asking for your experiences. The answer may or may not lie in what has already been suggested. Having said that I will follow through.

[Blue Bowtie]

Forget about the oil pressure switch. It does not interrupt power to the fuel pump. It is there only as a redundant path for power to the pump. If the FP relay fails, the pump will still run on the pressure switch. Study your schematic.

What happens to the "Security" light when the ignition key is inserted and turned to the RUN (not START) position?

[cliffw]

Thanks. That's what I thought, however Haynes said something about oil pressure light shutting it down. I have found Haynes lacking in some areas. I've rebuilt several Chrysler motors, & found Haynes fine for most mechanical issues, but lacking regarding diagrams &electronic/ electrical issues. I have much less experience with GM products, but Haynes seems to have same limitations. I don't have a security light - maybe burned out bulb. I'll keep plugging away. Thanks for all the help. BTW some time ago when we had a problem with intermittent gauges & headlights my daughter took it to a dealer to fix. After $200.00 they said it was a shory & they would need more time & $ to fix. I knew it wasn't a short, so cut my losses. I eventually traced it to the antitheft module, which I bypassed. I am no longer anxious to trust these things to a mechanic.

[Blue Bowtie]

If there is an anti-theft (VATS) module, and the ignition key contains a resistor pellet near the bow end, there should be either a "Security" or "Anti-Theft" warning lamp on the instrument panel.

This might help your diagnosis:

VATS/PassKey System

[cliffw]

Got 'er. Turned out to be bad connection at fuse. First time through I checked fuse, ok. Figured it must be something common to injectors, since not were passing fuel. Traced back to PCM fuse. Fuse was fine, but noticed contacts badly corroded. Cleaned them off, & fired up right off. This is a new one for me. Thanks again for all who helped. Cliffw