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  1. filip12900

    Black rear bumber around exhaust, fuel smell

    Hello guys. I have black residue on my bumper from the exhaust on my clio 172 ph1, and the exhaust gases smell like unburnt fuel. Probably the mixture is rich for some reason. I have a decat exhaust, with a central silencer between the 2 lambda probes and a rear silencer. Are the lambas dead ...