C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

Cylinder 2 Missfire not going away

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Old Jul 12, 2022 | 11:44 PM
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I drive a 2013 w204 C250
Cylinder 2 Missfire not going away

I really need some advice, any advice will help. I got this 2013 c250 about a month ago, and changed the spark plugs on the 3rd of july, everything was running perfect the spark plugs I installed where NGK Rithinium thinking they would be better, and about a week later the car started misfiring I first thought it was the alternator but the check engine light came on and turns out cylinder 2 misfired I changed the spark plugs again to NGK Iridium’s and nothing changed, I tried also changing the coil still misfiring so I put the original back on I also switched cylinder 1 and 2 and still only cylinder 2 I also tried clearing the code and reinstalling everything but the code is “permanent” please any advice? Also I gaped all spark plugs to .32
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Old Jul 13, 2022 | 11:38 PM
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W203 W212 W211 R53MCS
So, you installed a new spark plug and new coil? Compression test? Cylinder leak down test? Injector firing?
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Old Jul 14, 2022 | 09:15 PM
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I drive a 2013 w204 C250
Originally Posted by MBENZTECH
So, you installed a new spark plug and new coil? Compression test? Cylinder leak down test? Injector firing?

i haven’t done a compression test but it only really shakes when it’s up to temperature and shakes really bad when I put it in reverse and a little less when it’s in drive, I’m worried it’s my fuel injectors because it does smell like gas in the engine bay but don’t see any liquid anywhere I also just changed the valve cover gasket since there was oil a little in cylinder 1 and 2, i also thinks it’s my fuel injectors because on the mpg screen the white bar is all the way down and only when I’m driving it functions correctly.

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