The description of what's happening isn't clear. If starting fluid is required to get the engine to run, then it continues to run for 15 minutes, the best suspect is fuel pressure is bleeding off while the stopped engine is sitting, and / or the pressure is not high enough due to weak pump output.
If there is no way to get the engine restarted right after it stalls, that is the time you must check for spark and fuel pressure. Some engines will not run when the fuel pressure is low by only five or ten pounds.
You also need to read and record the diagnostic fault codes. It is real common for a crankshaft position sensor or a camshaft position sensor to fail by becoming heat-sensitive, then they will work again after cooling down for about an hour. On most engines you will lose spark, injector pulses, and the fuel pump, but there are some that only lose the injector pulses. That means you could have spark and fuel pressure, but the engine would only fire with starting fluid.
Friday, April 7th, 2017 AT 5:41 PM