If it sputters and dies gradually over a period of a few seconds, not instantly like a switch was flipped, a commonly overlooked cause is a collapsing screen on the pickup tube in the gas tank. One of the common symptoms, when the fuel pressure regulator is on the fuel rail on the engine, is the engine will run okay at highway speeds, and will tend to stall when the largest volume of fuel is being pumped which is during coasting.
The screen will stretch out after about five or ten minutes, but the problem will occur again much sooner than the first time. The fuel supply system is not monitored by the Engine Computer so it won't set a fault code or turn on the Check Engine light for related problems.
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Thursday, January 9th, 2014 AT 11:36 PM