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Message: [QUOTE="mavrik2747, post: 1559126, member: 34330"] So I recently bought my 2008 (deleted) and it didn't have service records, so I changed the filters and oil, was running great, with a little black smoke under acceleration until it warmed up after sitting for a week or so. Just had the coolant replaced and now it has a lot of white smoke until it warmed up on the way home from the shop. Didn't see any coolant leak and didn't get any codes. Heavy white smoke, I think it has the normal diesel exhaust smell but not sure and it's only under acceleration and while engine is still cold. Also has a rough idle and makes the truck shake much more than usual which really scared me. What would cause this? That was yesterday. Just went outside and started up the truck, revved it up a couple times and got some heavy white smoke. It tripped code P0304 for cylinder 4 misfire. I'm flabbergasted, was running great until I had new coolant put in... [/QUOTE]

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