Glow plugs won't fire after engine has warmed and cooled - Ford Powerstroke Diesel Forum
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Old 09-19-2013, 05:26 PM Rookie

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Glow plugs won't fire after engine has warmed and cooled

Hello Everybody. I have a 94 F350 7.3l non turbo idi with 200,000 miles. My glow plugs fire just fine when the engine is cold. But if I am driving around town and let the truck sit for a half hour or so they don't fire again until the engine is completely cold. Anyone have any ideas on what it could be? Thanks.
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Old 09-20-2013, 01:10 PM
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You'll probably get more answers posting in the IDI section - 7.3L IDI (Non-Powerstroke) Diesels - Ford Powerstroke Diesel Forum ; GP timing on the Powerstrokes is done by the PCM, whereas you have a dedicated glow plug controller. Different generations of IDI have different kinds of glow plug controller, but they're all some form of thermal control.
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Old 09-20-2013, 02:23 PM
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this is normal. gps are for cold starts.
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