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Grab guage and connect it to your trash can. There worthless.
 

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The ones that read from a stock O2 sensor can adjust fast enough to keep up with your ECU, so they constantly show your either rich or lean no matter what unless you "tune" the car to stay one way or the other. It's just too small a range for it to work in.

If your going to hook anything up get a wideband O2 so you can actually see what's going on, and adjust accordingly.
 

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'02 Civic LX Coupe
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Does this simply entail buying and enstalling a wideband oxygen sensor or do would I need to get more than just the new sensor and guage?
 

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You connect the O2 sensor OUTPUT wire to the you INPUT on your AFR gauge. And the gauge SHOULD fluctuate. Thats because in order to maintain proper afr's your O2 switches rich lean rich lean to maintain a stoic reading. yes i know this thread is old. Trying to help. And there worthless for BOOSTED application however for your stock setup it mimics exactly as your ecu sees it. because both your stock O2 and your afr gauge are slow.
 

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'89 CRX HF
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You connect the O2 sensor OUTPUT wire to the you INPUT on your AFR gauge. And the gauge SHOULD fluctuate. Thats because in order to maintain proper afr's your O2 switches rich lean rich lean to maintain a stoic reading. yes i know this thread is old. Trying to help. And there worthless for BOOSTED application however for your stock setup it mimics exactly as your ecu sees it. because both your stock O2 and your afr gauge are slow.
Thank you for bumping a 3 year old thread with an answer that has already been given
 
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