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Whoa! Before you start tearing out modules, why dont you have it scanned to see what's goin on first? It may not have anything to do with the electronics. Also what has been done to the truck in the past? This could be a simple problem like a branch tube fitting or sensor. I would see what codes it has, then move in that direction. Good luck!
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Values are typical and may vary by 10% depending upon current altitude, accessory operation, engine load, operating time, temperature, and vehicle speed.
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