Hi All,
My 2006 CLK 500 has a rough idle and a multiple cylinder misfire (usually cylinder 3 alone but sometimes multiple) however I’ve replaced all the spark plugs and the coil pack + Leads on cylinder 3 to no avail. I’ve noticed my o2 sensors are fluctuating hugely in Voltage when the car is idling and wondered whether that indicated a clogged cat or other issue. I’ll put the results below but i have read that big fluctuations can mean a clogged cat.
These are the lowest and highest values recorded while sitting idling over around 30 seconds.
B= bank
S = sensor
Oxygen sensor b1-s1 ( 0.100-0.710)
Oxygen sensor b1-s2 (0.2-0.560)
Oxygen sensor b2-s1 ( 0.095-0.715)
Oxygen sensor b2-s2 (0.695-0.700)
Could anyone give some expertise on what this could mean and whether this is normal, as shown b2-s2 does not seem to fluctuate much and seems correct. Any help would be appreciated
thank you
My 2006 CLK 500 has a rough idle and a multiple cylinder misfire (usually cylinder 3 alone but sometimes multiple) however I’ve replaced all the spark plugs and the coil pack + Leads on cylinder 3 to no avail. I’ve noticed my o2 sensors are fluctuating hugely in Voltage when the car is idling and wondered whether that indicated a clogged cat or other issue. I’ll put the results below but i have read that big fluctuations can mean a clogged cat.
These are the lowest and highest values recorded while sitting idling over around 30 seconds.
B= bank
S = sensor
Oxygen sensor b1-s1 ( 0.100-0.710)
Oxygen sensor b1-s2 (0.2-0.560)
Oxygen sensor b2-s1 ( 0.095-0.715)
Oxygen sensor b2-s2 (0.695-0.700)
Could anyone give some expertise on what this could mean and whether this is normal, as shown b2-s2 does not seem to fluctuate much and seems correct. Any help would be appreciated
thank you