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    Mazda CX-7 2010: Blowing black smoke

    Mazda Mazda Advice Mazda CX-7 Mazda CX-7 Advice Mazda CX-7 2010

    When I start my 2010 Mazda CX7 Luxury Sports first thing in the morning it blows black smoke out the exhaust for about five to 10 seconds. My dealer told me that this was normal and that all CX7s do the same thing, but is it normal? The other problem I have is when stationary at traffic lights, or when in traffic the car vibrates and idles roughly, and when I take my foot off the brake pedal it stops. Is this a vacuum problem, or is it normal?

    Answered by CarsGuide
    3 March 2011
    Graham Smith

    Neither problem would seem to be normal and I would be demanding the dealer do something about it. The black smoke would suggest it is running too rich in that first start-up phase, the rough running and stalling would suggest it is too lean once warmed up. I would certainly have it checked by the dealer.

    Disclaimer: You acknowledge and agree that all answers are provided as a general guide only and should not be relied upon as bespoke advice. Carsguide is not liable for the accuracy of any information provided in the answers.
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