Engine shuts off

2003 FORD EXPEDITION
100,000 MILES • 5.4L • V8 • 4WD • AUTOMATIC
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WM2469
  • MEMBER
  • 1 POST
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.
Feb 15, 2018 at 7:24 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 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
Feb 15, 2018 at 4:45 PM
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