Shuts off when you release key form start position

1991 FORD BRONCO
150,000 MILES • 5.1L • V8 • 4WD • AUTOMATIC
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BUDSTERW
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  • 1 POST
Vehicle starts when key is engaged in start position but shuts off when key springs back. No power to coil when key is in run position. will run if jumped from coil to positive battery. Help!
Jan 15, 2018 at 3:39 AM
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CARADIODOC
  • ✓Experienced Mechanic
  • 34,411 POSTS
I looked at a diagram for a 5.0L engine, and from what I can tell, a good suspect is a failed EEC relay. It is bypassed by the ignition switch during cranking.
Jan 15, 2018 at 4:34 AM
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