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so the 03 is hard to start when cold but when plugged in first crack and runs smooth and perfect, so grid heater wasnt working got that all fixed up then a new fuel filter, left it out side other day and let intake heat cycle when done first crack started right up, it was -15 out today tried it and glove box light was stuck on and truck just turned over but not real fast so getting new batteries, any other things to check besides injectors....
 

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How fast was it spinning over? I think spec is 200 rpm. I recommend Optimas for batts, made a huge difference in my truck. Do you have access to a rail pressure gauge?
 
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