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#1
12-05-2008, 08:44 AM
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C230 #4 misfire
Car: 97 C230, 145K miles
Problem: a couple of weeks ago my C230 suddenly experienced a CEL, ran rough.. no power.. I borrowed a OBD-II meter > the CEL code read that #4 was misfireing. I subsequently replaced all spark plugs [they had better than 80K on them] and seemingly all was fine . A few days later > car experienced another CEL, code read #4 misfire . I replaced the spark plug boot and thought all was fine Car ran great for a few more days .. then yesterday > same thing.. car > when cold runs great for about 30 min.. then it MIGHT suddenly misfire > #4 misfire and it chugs along on 3 cylinders. Why does it do that?? I've replaced the spark plug and the spark plug cap.. Is it the coil? recommendation for fix??
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Kim Langley 97 C-230 80 911 SC 73 2002Tii 
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#2
12-05-2008, 09:46 AM
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Swap that coil with the other and see if the code follows the suspect coil..
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A Dalton
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#3
12-05-2008, 01:33 PM
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I too would bet on it being the coil.....if you've made sure all other items are good, it'd have to be.
__________________
-diesel is not just a fuel, its a way of life-  '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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