Hi all, new member here.
I have a 2012 2.0L Auto CX-5 with 73k miles, dealer maintained from the beginning with all suggested jobs done. 3k miles ago, I realized a major increase in fuel consumption (I was used to drive 450kms with 50 liters, that dropped to 350kms with 50 liters in similar conditions) and hesitation (no vibration, but something like a minor power loss) under load, so dealer suggested to change spark plugs since it was not in stock at last maintenance. I have waited 2 weeks for plugs to arrive without a warning code, but one day I was on the highway, car started to vibrate, lost all power, CEL came on with SBCS and other warnings. The car was towed to the dealer, and they have changed the spark plugs with OEM ones (with Mazda logo). The failing cylinder's (no 2) spark plug was too dark and dirty with carbon compared to the others. I have done nearly 2.5k miles with the new plugs, no error codes or lights but again started to feel something is wrong with the car. The problem is not bad (or maybe not even noticeable for someone does not know the story), but i feel hesitation under load at low speeds and fuel consumption is getting higher (not as obvious as the first time).
I have a cheap OBD reader, and after a 25mins drive in the city, it shows 0 misfire for Cylinder 1, 1 misfire for Cylinder 2, 2 misfires for Cylinder 3 and 4 misfires for cylinder 4. I had the dealer check it via original Mazda software, they also did a test drive, but told that everything is fine. Would be great if you guys have any idea of what is wrong (or is it my obsession), thanks in advance.
I have uploaded a video with misfire and live data readings:
https://www.youtube.com/watch?v=VgL7OlvO-Hg
I have a 2012 2.0L Auto CX-5 with 73k miles, dealer maintained from the beginning with all suggested jobs done. 3k miles ago, I realized a major increase in fuel consumption (I was used to drive 450kms with 50 liters, that dropped to 350kms with 50 liters in similar conditions) and hesitation (no vibration, but something like a minor power loss) under load, so dealer suggested to change spark plugs since it was not in stock at last maintenance. I have waited 2 weeks for plugs to arrive without a warning code, but one day I was on the highway, car started to vibrate, lost all power, CEL came on with SBCS and other warnings. The car was towed to the dealer, and they have changed the spark plugs with OEM ones (with Mazda logo). The failing cylinder's (no 2) spark plug was too dark and dirty with carbon compared to the others. I have done nearly 2.5k miles with the new plugs, no error codes or lights but again started to feel something is wrong with the car. The problem is not bad (or maybe not even noticeable for someone does not know the story), but i feel hesitation under load at low speeds and fuel consumption is getting higher (not as obvious as the first time).
I have a cheap OBD reader, and after a 25mins drive in the city, it shows 0 misfire for Cylinder 1, 1 misfire for Cylinder 2, 2 misfires for Cylinder 3 and 4 misfires for cylinder 4. I had the dealer check it via original Mazda software, they also did a test drive, but told that everything is fine. Would be great if you guys have any idea of what is wrong (or is it my obsession), thanks in advance.
I have uploaded a video with misfire and live data readings:
https://www.youtube.com/watch?v=VgL7OlvO-Hg
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