Hello All,
I got 2012 Mazda 3 Skyactiv 2.0 with 120k miles on it. My car recently started misfire, so I replaced spark plugs that resolved the issue but I also decided to use my snake camera inside the spark plug hole to see condition of piston, see attached pictures. Now it looks like extreme buildup but not sure 100%, i only took pictures of first 2 cylinders.
Then I decided to use CRC intake valve cleaner hoping to cleanup that gunk. It never made while smoke like other mentioned after 1 hour soak but I had mis-fire and shakes on heavy acceleration (4k rpm). Car seems to run fine and I noticed improvement after CRC but never saw this type of build-up before.
Should I worry about this build-up?
I got 2012 Mazda 3 Skyactiv 2.0 with 120k miles on it. My car recently started misfire, so I replaced spark plugs that resolved the issue but I also decided to use my snake camera inside the spark plug hole to see condition of piston, see attached pictures. Now it looks like extreme buildup but not sure 100%, i only took pictures of first 2 cylinders.
Then I decided to use CRC intake valve cleaner hoping to cleanup that gunk. It never made while smoke like other mentioned after 1 hour soak but I had mis-fire and shakes on heavy acceleration (4k rpm). Car seems to run fine and I noticed improvement after CRC but never saw this type of build-up before.
Should I worry about this build-up?
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