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Old Mar 9, 2012 | 10:19 AM
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Jhbell
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trouble codes

I'm gettting codes 0683,0677,0678and 1670. i'm in the process of changing the valve cover gaskets and wire harnesses. I figure its time since the truck has 200,000. I also am changing the IDM relay today. My question is could the glow plug relay be going bad because i get a lot of white smoke at start up. its very hard to start in the morning especially on cold mornings. But once the truck warms up theres no problem starting after that. The glow plugs are fairly new, only about 2 years old. Can anyone help?
 
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Old Mar 9, 2012 | 10:31 AM
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carltonwebb
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Yes that is a posibility on GPR? U can check it if it is cold or get one from Napa (GPR 109).

If u need it, here is a link on how to check gpr.

https://sites.google.com/site/woodnt...ow-plug-system
 
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Old Mar 9, 2012 | 10:38 AM
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Would gpr have anything to do with the IDM relay or the EF signal though?
 
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