And what is it? Always assumed it was just water but now I’m pretty sure it’s not. Also do all cars do this?

    • doc
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      151 year ago

      If your engine is working very poorly. Unburned fuel in your exhaust is a problem large enough that you’ll probably be experiencing a lot of engine trouble.

    • Chainweasel
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      101 year ago

      No, if your car was built in the last 50 years it probably has a catalytic converter, which will burn off any fuel that hasn’t combusted before it gets out of the exhaust. And even so, once you get to the point where you’re having fuel flow out the exhaust it would be flooded to the point well beyond hydro-lock and wouldn’t be running at all.