Another piece of data. . . when I chagned the spark plugs the other day, they were black around the end except for a small area at the tip of each electrode tip (I had the Bosch 4 tip kind).

Is there a way to check the O2 sensors or to see what the mixture is running?

Thanks

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dyazdani
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'97 C230
'03 Honda CBR600RR
'92 Ford Explorer