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Old 07-13-2016, 10:29 AM   #1
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Signs of a bad fuel system

In the last couple of months I have experienced my car simply shutting off. There is no hesitation, stuttering, or shaking that would lead me to believe there was a misfire.

This "shutting off" has occurred 4 times, and it has happened on first start of the morning. I will start up the car, drive gently through my neighborhood for a half mile, and then the engine just stops. It always starts right back up with no problem.

I thought it may be the battery at first, so I have kept up on maintenance of the terminals and ensured they are tight. However, today which is the latest occurrence the radio, Bluetooth, and all other electronics did not turn off with the engine.

This leads me to believe there may be something wrong with the fuel system. Fuel filter? Fuel pump starting to show age?

I have a BAP on a stock fuel pump pushing 614 to the rear wheels. Of course, I am no where near WOT when these "shut offs" occur; regardless, do you all have any other ideas?

I have been data logging in the morning to catch this, but *OF COURSE* this morning is the morning where I didn't. Go figure.

I plan to start looking at fuel rail pressure with my SCT...I presume this can simply be read over OBD-II with the new 5.0s.
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Old 07-13-2016, 11:50 AM   #2
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There is no external filter and the ECM regulates the fuel pump pressure so, the only way this is likely to be fuel related is through a connection issue to the fuel pump electrically.
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Old 07-13-2016, 12:40 PM   #3
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I'll have to ensure I datalog and hopefully catch whatever it is. As always, it's the inconsistent things that are a real pain.

I already looked at the connections on the BAP, other electrical connections will have to be looked at.

So far, my SCT has not caught DTC codes either.
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