2000 C230 P0302 Cylinder 2 Misfire under Load - MBWorld.org Forums

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C-Class (W202) 1995-2000: C 200 CDI, C 220 CDI, C 270 CDI, C 180, C 200 K,C 230 K, C 220, C230, C 280

2000 C230 P0302 Cylinder 2 Misfire under Load

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Old 07-01-2011, 02:34 PM
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2005 C55 AMG; 2000 CLK320 Cabriolet, 2000 C230 Kompressor & 2001 ML430
2000 C230 P0302 Cylinder 2 Misfire under Load

Hi all, I am not really new here, just couldnt remember my old account info, what email I used before...

So I just got this car and am getting a Cylinder 2 Misfire under load at high RPMSs.
can drive for days with no CEL if driving conservatively. As soon as you step on it hard, it will trigger the CEL. When the CEL first appears, it seems to turn the injector off or something to that cylinder as you can tell it is missing, as soon as the car turns off and back on, the car runs normal.

I have swapped the coil and plugs from the #2 to other cylinders and the it still #2 triggering the CEL.

This last time it did as I was trying to switch lanes on the freeway from a almost 0mph in to a wide open lane, it triggered #2 and #4,

Ive attached the freeze frame pics from scanner, every other time it has been triggered its looked like the one with just #2, and this morning's it was the the both #2 and #4.

the only common thing on both, and every other time, is the high load (98-99%) and the MAF at 38.6 in.hg

any ideas what it may be?

thanks

-d
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2000 C230 P0302 Cylinder 2 Misfire under Load-2and-4misfire.jpg   2000 C230 P0302 Cylinder 2 Misfire under Load-2misfire.jpg  
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Old 03-12-2013, 05:37 PM
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2000 C230
c230 misfire on cyl#2 and 4

Did you ever find the cause for this? I have the same thing going on and have no clue...
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Old 03-13-2013, 02:18 PM
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2005 C55 AMG; 2000 CLK320 Cabriolet, 2000 C230 Kompressor & 2001 ML430
I cant recall what the exact problem was,
but I ended changing the spark plugs and the spark plug extensions, and the problem went away.

My receipt from autohausaz has 4 spark plugs and 2 spark plug extensions.

I think they were not making right contact and the spark plug extensions were really brown at the connection points.

-bb
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Old 03-28-2013, 12:28 PM
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2005 CLK 320
I have the same issue, a hard acceleration triggers the light and the engine runs rough. I have to pull over, turn the car off, then turn it on again and it runs fine. At first I thought it was crappy gas...but I will try the spark plugs too.
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