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Registered
91 CRX Si
Joined
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4,454 Posts
You splice into your oxygen sensor wire.
 

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Brokedick Millionaire
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41,007 Posts
Smash it with BFH ...A/F gauge is only good for a light show
13.09 using a AM AF, guess you went faster????? Well, I can read plugs also.

Purple on the AM unit goes to the ECU wire that gets O2 signal.
 

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Registered
'02 Civic LX Coupe
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609 Posts
Get a wideband 02 if you really want to monitor your AFR accurately.
 
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