Bronco with no spark
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Bronco with no spark
87 Ford Bronco new battery, plugs, cap and rotor, ignition module, coil, ignition lock cylinder. Pulled coil wire and checked for spark. Upon cranking, no spark appeared until I let go of the key. Anyone have any ideas?? 
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Coil
I'm suspicious of the coil, up to the point where you said you backed off the switch and got spark. Makes me think the switch contacts aren't lining up correctly or seated properly. Can you give more detail on the history of the switch etc?
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would this work?
Would a computer from a 1990 Bronco II XLT with a 2.9 liter v6 engine, automatic transmission, A/C, cruise, power windows and locks work in my 87 B II EB equiped the same way?
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Not seamlessly. A couple of differences I'm readily aware of: '87 uses an EGR system; '90 doesn't. '87 A4LD has vacuum modulated 3-4 shift, '90 A4LD has an computer controlled 3-4 shift. There might be some other subtle differences. Unless it's something you feel you have to make work, I would suggest getting the correct computer.
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