WHY IS MY 1996 CADILLAC SEVILLE STALLING AND NOT STARTING

Hi MikieZ! Here's a no-start trouble shooting guide to help you narrow some of the possibilities. Hope it helps! Good luck! http://www.samarins.com/diagnose/index.html

You may also want to look up how to test a starter on You tube, depending on the trim of your Seville, your starter may be located some where out side the engine, making it simple to test. OR if like my Seville, the starter may be located within the Intake manifold, making it more difficult to preform a voltage drop test.

There is a sensor with a diaphragm on the fuel rail that deteriorates from ethanol fuel allowing gas into the sensor that tells the engine to shut off. Replacement of the sensor with an aftermarket (ethanol proof) sensor should solve your problem and your engine will return to normal operation almost immediately. Your engine probably only starts and runs well after fuel is allowed to evaporate from the compromised sensor. Replaced my sensor and now runs beautifully, good luck!