A lean mixture can sometimes cause poor combustion and result in unburnt fuel in the exhaust. I have seen this on a wideband O2 sensor where the gauge pegged full rich at the time it happened (didn't notice the rich smell though).
A lean mixture can sometimes cause poor combustion and result in unburnt fuel in the exhaust. I have seen this on a wideband O2 sensor where the gauge pegged full rich at the time it happened (didn't notice the rich smell though).
2003 ZT 260SE Monogram Garnet Red #073
2004 ZT-T+ CDTi Aquamarine
1999 MX-5 Turbo