misfire
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c230k
misfire
Hi people,
New member here with a year 2000 C230K that has 64K on it.
Check engine light has been on for some time. Periodically it runs very rough. If I shut off the car and restart the problem will go away for a while. Recently the check engine light started flashing so I guess the issue has become critical.
Had the auto supply store look at codes and got P0170, Po130, P0301, P0302, P0300, P0304.
I have replaced the 4 spark plugs. Thinking about putting in a shot of injector cleaner.
Taking the approach of replacing the easier and cheaper stuff first unless there is a clear culprit here.
Contenders seem to be the MAF, the two O2 sensors, and possible air leak.
Any ideas would be appreciated.
Thanks
PillBox is online now Report Post
New member here with a year 2000 C230K that has 64K on it.
Check engine light has been on for some time. Periodically it runs very rough. If I shut off the car and restart the problem will go away for a while. Recently the check engine light started flashing so I guess the issue has become critical.
Had the auto supply store look at codes and got P0170, Po130, P0301, P0302, P0300, P0304.
I have replaced the 4 spark plugs. Thinking about putting in a shot of injector cleaner.
Taking the approach of replacing the easier and cheaper stuff first unless there is a clear culprit here.
Contenders seem to be the MAF, the two O2 sensors, and possible air leak.
Any ideas would be appreciated.
Thanks
PillBox is online now Report Post
MBWorld Fanatic!
Joined: Dec 2003
Posts: 3,275
Likes: 236
From: BC, Canada
2003 C230K Coupe Orion Blue
Your car is a W202, not a W203. This thread might get moved by the mods FYI.
What's the mileage on the car?
Typically I find that the ignition coils fail before the spark plugs. Have you replaced those? They're not terribly expensive. However, those would only take care of P0301 P0302 P0303 P0304. I suspect these aren't the culprit in your situation, but they will begin to fail at higher mileages.
Best to change 1 set of parts at a time, as probably only 1 faulty component is causing most if not all of the problems. I'd probably start with looking for some sort of vacuum leak, since P0170 is a fuel trim malfunction. I once had that error (yes, I have a different engine) and the problem was caused by cracks in the vacuum lines (secondary air injection) which were then throwing off the air/fuel ratio.
What's the mileage on the car?
Typically I find that the ignition coils fail before the spark plugs. Have you replaced those? They're not terribly expensive. However, those would only take care of P0301 P0302 P0303 P0304. I suspect these aren't the culprit in your situation, but they will begin to fail at higher mileages.
Best to change 1 set of parts at a time, as probably only 1 faulty component is causing most if not all of the problems. I'd probably start with looking for some sort of vacuum leak, since P0170 is a fuel trim malfunction. I once had that error (yes, I have a different engine) and the problem was caused by cracks in the vacuum lines (secondary air injection) which were then throwing off the air/fuel ratio.
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Joined: Feb 2024
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c230k
Looks like I put in the wrong plugs even though listed on AutoZone for this car. I have also replaced the two coils.
The car still has periodic rough engine and sluggish but am hoping the Bosch FR-7-KTC will do the trick.
The car still has periodic rough engine and sluggish but am hoping the Bosch FR-7-KTC will do the trick.
