Rich Fuel Mixture

[ferncreekjeep]

I have a 96 GCL (with 155k) and noticed that more than usual smoke/vapor from the exhaust. I know that when its cold this will increase but usually subsides after the engine warms up - mine does not subside. I also noticed that the mpg are lower than in the past. Could this all be related to a bad O2 sensor? Please advise.

Thanks

[heyraver]

Yeah, that's more likely your
02 Censor. Is your Check Engine
Light on?

[ferncreekjeep]

Thanks for the reply.
I do not have a CEL on and it is operational.

[heyraver]

Try bringing your jeep to Autozone,
and have them scan it. Even though
your CEL isn't on, I think Autozone
might be able to check if your 02
Censors are working properly. It's
free too, so it's worth a try.