2001 Buick Century Starter okay but won't run

2001 BUICK CENTURY
190,000 MILES • 3.0L • V6 • FWD • AUTOMATIC
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CATHODERAY
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Bought used and drove about 12 times. Last trip it wouldn't start. Battery charge is full, 12+V to the starter but not the relay. Jumped from battery+ to starter relay terminal and engine turns over and revs with gas pedal but stops after two seconds, very repeatable.
Jun 15, 2015 at 4:22 AM
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SATURNTECH9
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So it will crank but no start?Is the security light on solid or flashing with the key in the run position?
Jun 15, 2015 at 6:48 AM
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HMAC300
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try resetting security system first see pic
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Jun 15, 2015 at 6:48 AM
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CATHODERAY
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With power hot-wired to the starter relay, and the key in On (or even in Crank) the engine turns over, starts, makes power, revs-up briefly if gas pedal is pushed, then stops cold. Wait a few seconds hotwire again, same result.

Without hot-wire, turn the key to On get all the dash lights, turn key to Crank, dash goes dark, then back to On and dash lights come back.

I remember looking at each of the dash lights (appears to be lamp test mode) but don't recall seeing "security" light.
Jun 15, 2015 at 8:49 AM