Re: Air fuel ratio question
To answer the OP's question, yes, that is correct. I have found that the farther away from the exhaust port the leaner the number reads. I have seen it to be somewhere between .6 to 1.0 on the AFR ratio. The 02 closer to the port is what I believe to be a more accurate number of what the engine is running, but the collector is a good number to have a reference to make sure the two banks are running fairly balanced to each other
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