I posted this in my other thread about my ECU check, but I wanted to see if anyone had any opinions about this....
My car runs rich- It gets horrible miliage and while I have a solid ignition system, I can smell raw fuel out of the exhaust at idle sometimes.
Well, I check the 02 sensor voltage and at idle I got .2V. Kindof low, and if I rev it, I can only get it to change by about .05V either way.
The best part is, if I drive it, and floor it, the voltage DROPS to about .07!!! Huh? Isn't that a little backwards?
This sensor is only about 4 months old, replace by a shop that knows nothing about 7's. (Don't ask why it was there- please) I gues it could be fried, but it is sure acting wierd.....

 

I have the same syptom of a bad smell of gas. I literally cough and hack when I go behind my car to get somethin or adjust my amp. I have never replaced my O2 sensor. Maybe that could be why my mileage went for **** the last while. Is it difficult to replace? Are there any special kinds?

 

Well, first thing would be to check the plugs- been a while since they've been replaced? What about the wires?
After that, ya the o2 sensor can definately contribute to rich running if it's not returning enough voltage.