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the k5 sat for a few years before i bought it. the truck now has 137k on it. basically all new seals, and major tune up to get it right. reliable truck, but it idles rough after warm up. i replaced the IAC valve because the old one failed. the monitor shows lean code but it runs like it's rich. have also overhauled the tbi with a kit from autozone. it's getting proper fuel pressure. any ideas floating around out there?
