wiring plx300 wideband to ecu
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Honda-Tech Member
Joined: Oct 2003
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From: New Castle, DE, USA
wiring plx300 wideband to ecu
hi i did a b-swap into my 92 4 door civic and bought the plx300 wideband a/f monitor... i just wanted to know if anyone could tell me where to wire the gray and white wires to the ecm so i can replace my stock o2 sensor.. or send me a link to the entire procedure...the instructions included were 1 paper and they suck... thanks
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Joined: Jul 2003
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From: USA
Re: wiring plx300 wideband to ecu (jdmspecb18)
Go to PLX website plxdevices.com and they have tech support. you can wire the narrowband (gray i believe) into the stock ecu signal location. Since i use neptune, i feed the ECU the wideband signal (white).
Joined: Sep 2002
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From: camden, de, usa
Re: wiring plx300 wideband to ecu (jdmspecb18)
you wire it to d14. on obd1 car. grey if you want it to read narrow band readings to ecu like stock o2 sensor or white if you want to send wideband signal to ecu for datalogging a/f. 
hope that helps 
hope that helps
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Joined: Jan 2007
Posts: 391
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From: Port Huron, MI, USA
Re: wiring plx300 wideband to ecu
what do you wire the wire wire on on the Neptune RTP system? I can get my hands on a Innovate system but i have read it was junk but i want my tunerview II to show are fuel, If i am in wrong area i am trying to do seaches, but thanks for help in advance
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