#MazdaSkyactiv
Piston Slap: Misfiring on Mazda 3 Skyactiv's Diagnosis?
Brian writes:
Hi Sajeev,
You are my go-to guy for in-depth automotive knowledge. (Wow! Honored. – SM)
My brother has been having a heck of a time with his 2012 Mazda3 Skyactiv. It’s got about 70k miles on it, and in the past 2 years it’s been in and out of the shop. It started with high engine oil consumption (more than a quart per 3k miles, and going up to this day). Then the ignition coils needed to be replaced. Then the MAF and oxygen sensors needed to be replaced. Right after those were fixed, he had to take it back to the shop because there is now a misfire in one of the cylinders.
What’s going on here? My only guesses are worn piston rings causing engine oil to run into the combustion chamber (then down the exhaust and ruining the O2 sensor), or malfunctioning PCV, a broken EGR system, intake valves with a lot of carbon deposits, or simply “bad luck” with this car.
Hope you are able to shed some light on this mystery. Thanks!
Mazda Says Skyactiv 2 Engines Will Debut Around 2020 & Boost Fuel Economy 30%
While other automakers explore hybrids and new tech in their pursuit of better fuel economy, Mazda is concentrating on refining the more than century old internal combustion engine. The automaker told Automotive News says that it expects to achieve 30% better mileage with its next generation of ICEs than the fuel economy of its relatively new line of Skyactiv engines currently being rolled out. Called Skyactive 2, the next gen gasoline and diesel engines will debut around 2020, according to Mitsuo Hitomi, who heads Mazda’s powertrain development. “If we want to dramatically improve fuel economy from here, the only route is through lean burning,” Hitomi said at briefing at Mazda’s Yokohama technical center.
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The scuttlebutt on Mazda is that Japan’s favorite independent automaker is in the toilet, having to shed jobs in America and assets in Japan just to stay afloat. While Mazda may be strapped for cash, their less-than-liquid holdings, like a baseball team and $5 billion worth of land, don’t look so bad.
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