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...todays engines 'start' in "open-loop' (no computer control) which CAN be too rich, but should become "normal" as soon as the engine warms up enough for the computer to go into "closed-loop" control, usually within 1-3 minutes or sooner if being driven (loaded).
...is there a "puff" of black smoke during start-up, too? That, typically, should not occur.
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