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Engine shuts off

Tiny
WM2469
  • MEMBER
  • 2003 FORD EXPEDITION
  • 5.4L
  • V8
  • 4WD
  • AUTOMATIC
  • 100,000 MILES
My SUV will just shut off while sitting idling, within thirty seconds it will crank right back up. It idles smooth for a minute or two then shuts down, but it will crank right back up again. I changed a fuel relay and it stopped this for a week but now it started back again.
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Thursday, February 15th, 2018 AT 3:24 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning.

I would start by checking the fuel pressure. You may have a failing fuel pump. There should be an access port on the fuel rail for this test. If you do not have a tester, you can rent one at a parts store.

A crankshaft position sensor could also cause this issue as well. You would need a scan tool to check this. It would also set the check engine and store a code.

Roy
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Friday, February 16th, 2018 AT 12:45 AM

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