Deleted cars puff smoke at cold start. Best thing to try is running some "Everyday Diesel" in your fuel, and also try some "Stiction Eliminator" in the oil. Frequent oil changes, and good diesel. May also want to check the specific oil you are running. I have had some of this with my deleted F15, and my buddy has also with his deleted E70. Those are things we have done to eliminate it from being a problem.

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