Join Date: Jan 2005
Location: West Valley City, Utah
Yeah whenever your HC's and Nox is high it usually indicates a rich running condition. As Gleep said, check the air filter, plugs, wires, cap,rotor and O2 sensor. Something is causing the engine not to properly burn all of the fuel in each cylinder.
1994 YJ 4.0 H.O.
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Score: 406RRv1.0 with a BOA of 31.60