Recent content by angelocardoc

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    Help: Mazda3 Rough Acceleration/Backfire

    Back in the late 90's and early 2000's, when I was a mechanic, many emission issues were bad O2 sensors. (Among other things like EGR valves, catalytic converters, etc etc...) Just like a spark plug, the O2 sensor needs to eventually be replaced. Many times the vehicles powertrain control...
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    Help: Mazda3 Rough Acceleration/Backfire

    How do you check your O2 sensor??? Scan tool?
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    Fuel Economy issues (2010 Mazda3)

    Hi I'm new to the Mazda247 community. I was wondering if I could get some feedback from others about the fuel economy of my ride. I recently picked up a 10' Mazda 3 Sport hatchback 2.5L & 6 spd. (not a Skyactiv powertrain) Noticed that my fuel economy is horrible. The last three tanks I...
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    Help: Mazda3 Rough Acceleration/Backfire

    Bad gas??? Where did you fill up last? You in the GTA area?
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