Sl2 stalling out.

[ztranier]

I have a 1997 SL2 Saturn. The car starts up fine. Once it reaches operating temp it just stops running. (I let it idle 15 minutes). If I wait 10 minutes for it to cool down it will start, run it another 10 minutes or until it gets to between a quarter and half way on the gauge it will stall. Wait for temp to drop it with start. It has 160000 miles on it. I replaced the up stream O2 senso recently but it was doing it before it was installed. Can anyone help?? Please!

[fdryer]

Are you aware of posting your S-series in the L-series forum? You're likely to get more replies there (S-series tech forum).

The best time to check why the engine stops running is when it dies, preferably on your driveway. Fuel and spark need to be checked with spark easier to test. Remove plug wires from coils and have someone start up while you observe for spark across both coil towers. Lack of spark is one of two clues. Fuel checking may require a two step check, pressure at the fuel test valve and removing spark plugs to examine them for fuel. Lack of fuel on plugs may be difficult after the engine is warm when it's not recommended to remove plugs. Fuel spray from the test valve doesn't check for injector operation. An intermittent crank sensor may be the problem and fits your descriptions. Without an operating crank sensor the EFI system cannot run; fuel pump, ignition system for spark and injectors. The sensor is located above and behind the starter, mounted with one (10mm?) bolt. Normal resistance measurements should be between 700-1200 ohms. Engine heat cycling creates conditions for intermittent sensor failure.