My brother has a 99 civic si, he installed an eddlebrock performer x turbo kit about 6 months ago. Ever since he hashad a problem with the cel turning on. At first the shop said it was a bad secondary o2 sensor so he replaced that and still had the problem. Then he replaced all the hose clamps since the one eddlebrock gave him were cheap and possibly created a boost leak. It worked good for two days and now its back on. When the cel comes on it starts giving it to much fuel, any ideas of what this could be?
Thanks

 

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