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Hello I have just received my jb4 in the mail today and have installed with stock spark plugs. The car pulls great and really does feel a lot quicker on the butt dyno on map 1. However I have tapped into the o2 sensor for the fuel wiring and have connected the fuel wire to the red cable. I saw on Tuning - JB4 Installation that he has installed the same way but on Kia & Hyundai JB4 - N54Tech.com - International Turbo Racing Discussion people connect to the white wire. Just for clarification which wire did you tap into? I do not have the fuel adapter so the installation won’t be the same if you have this.
 

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Just get this adapter from Ebay. Works great and you don't have to poke holes in any of your stock wiring.
3892
 
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