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Well, I checked the engine sounds at idle, and I didn't hear anything weird like a continuous clicking or noise. The only thing is that after replacing all the Spark Plugs and Ignition Coils with the OEM parts about a month ago, I felt the Jeep vibrates a little bit on idle and when I drive it...

Thanks! Yeah, I'll ask the mechanic guy to do that the next time I see him. Although the lean air/fuel ratios can also come up with specific codes, like P0171 and P0174, it is still possible that something is wrong with one of the sensors for this cylinder misfire case. Which sensors do you...

Thank you! That makes sense. I'll go ahead and run two full tanks of Shell V-Power Nitro Premium gas, and will add 20oz Techron fuel system cleaner to the first tank. For the second tank, I'll add 12oz SeaFoam spray to the intake part before the throttle body. Hopefully, it cleans the dirts and...

Hi Everyone! I have got a Jeep Liberty 2007 with about 150k mileages some months ago, and the CEL was on. The code was initially P0306 (Cylinder 6 Misfire Detected), and it has been on at least since 2020 as I saw that on an old emission inspection certificate. After some while, another code...