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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

no spark while cranking

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Old Feb 5, 2010 | 04:20 PM
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no spark while cranking

On an 86 bronco with the 351. . . just did a motor change. It won't spark while the started is engaged. Sounds confusing but just as you engage the starter, and just after you let it go. . . it will spark. And to confirm it will cough once when you let go of the starter. So. . . any ideas? Oh and the wiring harness going to the distributor. . . has a single wire connector that I can't remember where it goes and don't see anything for it. The capacitor is connected so its not that. Ideas? Thanks.
Timmy
 
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Old Feb 5, 2010 | 08:21 PM
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See if you have voltage on the coil + during cranking.
 
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Old Feb 5, 2010 | 08:57 PM
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Negative coil voltage was virtually non existent, 1.5 volts. Did a lot of DS2 tests recommended on here and checked all kinds are wires. Seems like cleaning posts and connection on the starter solenoid did the job. Shes runnin like a top now.
Timmy
 
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