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If your Prelude is blowing quite a bit of black smoke from the exhaust, it could be that it's running rich on fuel, which is somewhat common in H-series motors. A solution for this if it's a concern is to use sea foam solution to clean up engine deposits. It's also possible there's an oil leak where it is leaking past the engine's cylinder walls into the combustion chamber. Check your oil periodically, and if it seems like your oil level is going down faster than normal between oil change cycles, then that's the likely cause. The easy solution if that is the case is to top off the oil to compensate, and/or again use sea foam in the oil crankcase to clean it up.

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11y ago
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Q: Why does a 1999 Honda prelude smoke?
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