My 93 Accord EX with the fluctuating RPM at idle issue (worse during warm weather). I replaced the O2 sensor on the exhaust manifold, tune up, fuel filter, and cleaned the IACV. After cleaning the IACV, the issue got worse. I was told there was another O2 sensor. However, I traced the exhaust pipe, can't find any more. I am at a loss. Any ideas would be greatly appreciated.
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Any ideas would be greatly appreciated.
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