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1988 Ford F-250 loose of pip siqnal after running for about

Tiny
DB4U2PLAY
  • MEMBER
  • 1988 FORD F-250
  • V8
  • 4WD
  • AUTOMATIC
  • 126,000 MILES
I have replaced all of the coponets that deal with this I put in new dist. With pick up, new module, new map, new eca, and after all that it still doing the same thing but seem to be getting worse I checked grounds at eca they all are good new ignition switch but the pip signal still is lost
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Friday, October 16th, 2009 AT 9:37 AM

1 Reply

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Check the eec relay. This relay is mounted under the dash next to the ecm (on bronco), not sure if in the same spot on the f-150's. Â This relay is also powered from a fusible link. The eec relay, and fusible link can go bad after time and cause a crank no start condition with no power to the fuel pumps, injectors, ign. Module etc. See if there is any corrosion in the socket.
ON A 4.9L. IN THE WIRING HARNESS THERE IS TWO WIRES (WHITE WITH A BLUE TRACER) JUST ABOVE THE OIL PRESSURE SENDER THAT TURNED GREEN AND BROKE. THIS IS THE WIRE THAT POWERS UP THE COIL FROM THE IGNITION SWITCH.
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Friday, October 16th, 2009 AT 3:27 PM

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