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Message: [QUOTE="highestpoint, post: 1276071, member: 18285"] Not exactly. Striction can play a role and if the oil is cold then the injectors aren't moving freely. If it were the fuel pressure regulator then I can see where you're coming from and would agree that it's not fuel but considering there's noticeable differences on a tune that requires more fuel. I would think that would be the first think on my book to check. It wouldn't hurt to do the blue spring mod anyway. Do you have a block heater? If so plug it in at least 4 hours before starting the truck and see if that helps. Oh and what oil are you running and how many miles do you have on this cycle? [/QUOTE]

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