Car starts for two to three seconds then stalls

2003 OLDSMOBILE ALERO
110,000 MILES • 2.2L • 4 CYL • 2WD • AUTOMATIC
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VINNIEVALENS
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Changed out ignition switch, pass-lock sensor, still won't start. Noticed that gas gauge was at 1/4 tank then drops to or below the E while key is on. Will return to 1/4 tank after a few second's then back to E. Any ideas would help.
Dec 7, 2019 at 2:20 PM
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STRAILER
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Hello,

When you crank the engine over to start the engine does the security light flash? If so this guide will help reset it:

https://www.2carpros.com/articles/how-to-reset-a-security-system

Please run down this guide and report back.
Dec 8, 2019 at 5:48 PM
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VINNIEVALENS
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Sorry, tried all the resets and still won't start. Security light is on and not flashing. Engine runs for a few seconds and stops.
Dec 13, 2019 at 8:48 PM
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STRAILER
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When the engine stalls, turn the key off then to the on position without cranking the engine over can you hear the fuel pump run in the tank for 5 seconds?
Dec 16, 2019 at 11:08 AM
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VINNIEVALENS
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Yes, checked fuel lines and wiring. Fuel pump works and there's gas running to the engine (pressed bleeder valve and strong pressured gas shot out).
Dec 16, 2019 at 10:03 PM
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STRAILER
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Okay cool, now when the engine stops running can we check for spark? Here is a guide to help us:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Please run down this guide and report back.
Dec 17, 2019 at 11:53 AM
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VINNIEVALENS
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Hello, checked ignition coils and installed new spark plugs (needed new ones anyway, been 8 months since I last changed them). Tried 30 minute reset to make sure it isn't security. On last 10, I turned on key. I didn't start it but noticed that security light and service vehicle soon came on. Security light is not flashing, but just on. Any ideas?
Dec 20, 2019 at 7:42 PM
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STRAILER
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Do you have spark when the engine is cranking over? Check out the guide for the test.
Dec 21, 2019 at 11:29 AM