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Message: [QUOTE="Blubyu, post: 1346376, member: 24845"] Pre face: 2006 F250, new truck to me, not my first 6.0L though, supposed EGR ******, does have head studs, blue spring upgrade, exhaust, and intake. SCT 65hp tow tune with EGR turned off. Not all the time while sitting in gear it will pump a light cloud of white/ grayish smoke out the tail pipe. Additionally under light throttle it will smoke white/ gray. None of this is consistent though it's intermittent. Hard acceleration some black soot like usual. Runs well, starts fine, no lack of power. Supposed I could pop the EGR valve out see if there's coolant in there or not. That way I could rule out the EGR cooler? Any ideas for a process of elimination to narrow down what's causing this? [/QUOTE]

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