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

Warm engine, no start.

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Old Jul 18, 2016 | 07:55 AM
  #1  
1987_XLT_Lariat_F250's Avatar
1987_XLT_Lariat_F250
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Warm engine, no start.

I have an 85 F250 with a 460 engine in it, once I run it and it gets to operating temp it won't restart after shutting it off. It just cranks very slow.. Suggestions??
 
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Old Jul 18, 2016 | 09:39 AM
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Are you running headers?
 
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Old Jul 18, 2016 | 10:03 AM
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If he starter is cranking slow, sounds like "heat sink" Headers, as Mentioned, increase the heat around the starter and it "swells" and can not turn easily, between that the poor (rotted) ground wire, the battery cant push the electrons as fast as on a cold starter.......
 
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Old Jul 18, 2016 | 10:30 AM
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That makes sense, I'm not running headers so I'd say thats the area I need to focus on.
 
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Old Jul 18, 2016 | 10:37 AM
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If not running headers, check closely that all battery [positive and ground] and starter cables are in good condition and that the connections are clean and secure.

Perhaps the battery is failing?
 
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Old Jul 18, 2016 | 02:39 PM
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This might be a good read for ya ... Voltage Drop Testing How-To: Fix That Slow Starter

-Enjoy
fh : )_~
 
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