1999 F-350 cold start problems - Ford Powerstroke Diesel Forum
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post #1 of 1 Old 07-09-2008, 07:38 PM Thread Starter
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1999 F-350 cold start problems

I have a 99 F-350 that I recently had to replace injectors on. I replaced all 8 injectors; figured I would replace them all since I was in there to begin with. Now the truck is very difficult to start in the morning. Once it does start it idles really rough and has absolutely no power until the truck warms up. I replaced the glow plug relay and now I am getting a code P1391, low voltage glow plug r side. Any ideas on what this may be? Does the lack of power and rough idle seem like a glow plug issue? The temp here in the morning has been in the low 60's. Also my fuel mileage has dropped about 4 mpg since I replaced the injectors. Help please.
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