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Originally Posted by maui
I would think that sampling one cylinder would be less than optimal as not all 8 have the same A/F ratio unless you're going with port injection, and even then you have to have individual O2 sensors to really know.
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Yes, that was the point in mentioning it. Some DFI systems can sample two sensors but the Accel folks said one side is adequate.
Don't put two on one side!!! The modern systems have two on each side - one before and after the catalytic converter. They are used to measure the presence and effectiveness of the cat.
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so in both cases the lead is under the car and can't be easily seen, and still works fine, correct?
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Yes. ERA626 sounds like his is where mine was.