Slow Start When Hot?
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Logistics Pro
Joined: Mar 2001
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Slow Start When Hot?
84' F250 XL, 460 auto. When the truck has gotten up to temperature, it won't restart-it's as if the starter is barely working, very slow. Battery is fine. Starter is only 3 months old. Cold it starts up perfectly, very easy. Any ideas?
Lead Driver
Joined: Jul 2009
Posts: 6,477
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From: Sheffield, AL
The 460 engine generates quite a bit of heat. Has the exhaust been altered? If using headers or if the exhaust pipe is very close to the starter motor, it can have these symptoms.
Have you checked the ignition timing? If too advanced, the engine will struggle to start, especially when hot.
Check all electrical connections between the battery and the starter. Corrosion causes resistance.
Have you checked the ignition timing? If too advanced, the engine will struggle to start, especially when hot.
Check all electrical connections between the battery and the starter. Corrosion causes resistance.
Lead Driver
Joined: Nov 2013
Posts: 7,171
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Here you go, written specifically for you:
https://www.ford-trucks.com/forums/1...w-starter.html
When the engine is cold, compression is lower so the engine is easier to spin. When hot, compression increases and the starter system has to work harder. Heat also affects the starter motor, too, but I think the increase in compression is the biggest culprit.
https://www.ford-trucks.com/forums/1...w-starter.html
When the engine is cold, compression is lower so the engine is easier to spin. When hot, compression increases and the starter system has to work harder. Heat also affects the starter motor, too, but I think the increase in compression is the biggest culprit.
Tuned
Joined: Feb 2014
Posts: 338
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From: prineville
"starter is only 3 months old"
im gambling your starter went bad.
especially since yourtone makes me think you have not had this problem b4.
other possibility: the 3 months the starter has been in and you cable from fender relay to starter is not conducting amp adequately.
im gambling your starter went bad.
especially since yourtone makes me think you have not had this problem b4.
other possibility: the 3 months the starter has been in and you cable from fender relay to starter is not conducting amp adequately.
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Logistics Pro
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I will check out the timing-I didn't consider that would make the starting hard. I will also check the cables.
The exhaust is stock. There is no heat shield protecting the starter-not sure if there was supposed to be one.
The exhaust is stock. There is no heat shield protecting the starter-not sure if there was supposed to be one.
Lead Driver
Joined: Jul 2009
Posts: 6,477
Likes: 19
From: Sheffield, AL
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Senior User
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From: Oregon
That's a great idea!
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Logistics Pro
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I will check this out for sure. Thanks.
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