I have a 1994 S-10 with a 4.3 Vortec Z code engine. The truck has 175000 miles and the check engine light just came on with a code for the oxygen sensor. The truck has started to run a little rough when cold, could this be due to the sensor? I also have a strong smell of gasoline such as when older carb's would flood that was present before the check engine light but can not find any leaks. The truck gets around 17 - 18 mpg around town. Would worn injectors in the TBI cause this smell, rough idle, gas mileage. The truck runs good under acceleration but seems sluggish in normal cruise conditions.Thanks for any help.
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