Mechanics

ENGINE SHUTS OFF AT OPERATING TEMPERATURE

1991 Buick Century • 198,000 miles

3.3 litre engine shuts off when warm. New ecm, ignition control module and knock sensor. No spark after shutdown. Fuel pressure good at shutdown. Injectors ohm out at 12.8 hot or cold. Occurs after cooling fan cycle(s) on-off.14.2 volts at battery. Computer ground good. Code 44 set first time today. Will not always go into closed loop. Today showed a lean condition, rapidly flashing engine light w/aldl jumped. Prior would show closed loop. Engine runs, gets hot, shuts down, restarts after 5 minutes, sometimes takes longer.
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Centurybuick
May 27, 2013.




Suspect faulty Dual Crank Sensor

Docfixit
May 27, 2013.


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