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External fuel pump failure

Tiny
RICHARD SMITH2
  • MEMBER
  • 1987 FORD F-150
  • 6 CYL
  • 114,000 MILES
Replaced PCM, fuel pump relay, fuel pump, fuel pump relay, but fuel pump not running when key on. Truck starts for a second then shuts off.
Sunday, February 12th, 2017 AT 2:13 PM

4 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check for power and ground to pump is relay sending power? Is fuse or fusible link good dual or single tank?
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Sunday, February 12th, 2017 AT 3:49 PM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
I am not seeing an external pump for this truck, is this a modification?

The Medic
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Sunday, February 12th, 2017 AT 4:40 PM
Tiny
RICHARD SMITH2
  • MEMBER
  • 2 POSTS
Thx 4 reply, now got pump energized but trk starts and runs rough, hiccups and stalls initially. If I use pedal to idle up engine and maintain 4 several mins she will
Run on her own but still hear hiccups or missing sounds. Replaced fuel pressure regulator, o2 sensor also
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Tuesday, February 14th, 2017 AT 12:24 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check fuel pressure with a gauge auto parts rent it see link
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
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Tuesday, February 14th, 2017 AT 12:49 PM

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