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Weird starter issue

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Old Mar 3, 2016 | 06:20 PM
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Weird starter issue

Here goes, when starting my 79 f 250 with 400 the starter stays energized only after the truck starts. When cranking if I let off the key it stops cranking so it's not the relay. If the truck starts, only then the starter keeps cranking. I have a new key switch and relay anyways. Any ideas? I tried searching but didn't find much.
 
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Old Mar 3, 2016 | 09:24 PM
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if you pull the wire off the S terminal of the solenoid does the starter stop? If so, you need to find out why that wire is energized when the key returns to run from the crank position.
If it doesn't stop, it could be the solenoid contacts are welding together or the starter bendix could be sticking in the flywheel and not retracting.
 
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Old Mar 4, 2016 | 03:17 AM
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The S wire is only hot when the truck starts. I read on here it could be a problem with ignition module but I can't find the post now.
 
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Old Mar 4, 2016 | 11:48 AM
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Try the new solenoid first.
 
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