Cold start it runs perfectly after it warms up to normal operating temperature it shuts off?

Hi,

I believe the crankshaft position sensor is bad. When they begin to fail, they get adversely affected by heat which shuts spark off to the plugs (starting fluid didn't work).

Take a look through this link and let me know if it mirrors what you are experiencing:

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

Let me know your thoughts. I feel somewhat confident this is the problem.

Take care,

Joe

Hi,

Double check for spark. If it is present, it should be a blue snapping spark. If it appears white or orange, that would indicate it is weak.

On the other hand, even a weak spark should have done something when using starting fluid. My gut feeling is the crankshaft position sensor is the issue, but I have been wrong before. LOL

Here is something we can do. If the vehicle has a tachometer, see if it moves a bit when cranking the engine in a no start condition. If there is no movement, the sensor is the likely issue. Also, if you have a live data scan tool, check for an RPM signal when it won't start. If there isn't one, replace the sensor.

Let me know your thoughts or if I can help in any way.

Take care,

Joe