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To me it sounds like a CPS starting to fail
Posted by Ron J (more from Ron J) on Sat, 20 Nov 2004 07:56:35
In Reply to: stalling out while driving, Sherri, Sat, 20 Nov 2004 06:06:46
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In my opion that is how a CPS-Crankshaft Position Sensor can start to fail.Does the tach needle bounce at all when the engine does not start??? You must see the tach needle move up and down(bounce) a slight amount to confirm the CPS is functional.The car needs a signal from the CPS to pull in the fuel pump relay and to provide the tach signal.The CPS is a "Hall Effect" sensor and there is not a static test proceedure to test it and show if it is good or bad.A lab scope if used can look at the output signal and see if there are problems with it and confirm if it's Bad.They become sensitive to heat as they age,and will behave as yours is,when it reachs a certain temperature and then fails to work and the engine stops.The interval the engine will run becomes shorter and shorter until the engine won't start at all.Look for the tach needle to bounce when cranking over the engine is a very good clue if it is your problem.
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