Anyone ever replace O2 sensors that didn't code and get a gas mpg improvement?

[Sapperfire]

Try switching gas stations, I run Shell 93, Laser was using Exxon 93 when I met him, and he had some probs with their gas

 

[94m5]

I am going to replace the 02's in the 95 this weekend. Ive been noticing decreasing fuel economy, and think that at 90,000 miles.....they are due.


I am ALSO having the stumbling issue when cold and all that jazz. Really kinda pisses me off. I let the car idle for a few minutes to let the enging get *some* heat in it.......but doesnt help.

It will fall on it's face at anything above 1/4 throttle before it is "warmed up".

I just did my coil on plug swap which did'nt help anything but the part throttle stuble when cold(burnt wire).

this friday im doing

Plugs
O2's
Air filter
Fuel Filter
and an oil change.


We will see what happens.

Mike

 

[Myco]

Try switching gas stations, I run Shell 93, Laser was using Exxon 93 when I met him, and he had some probs with their gas

Interesting coincidence. I was getting Exxon for the past month. New station by work.

I just filled up the tank 30 min ago. Velermo. We'll see how it goes.

 

[Chris_Murder]

I changed mine at 120,000 miles due to lean bank 1 and lean bank 2 errors, my gas mileage went down 1 mpg, but my check engine light turned off. Oh well

 

[Moes8]

for what its worth.....................


http://www.toptiergas.com/retailers.html
.

.

 

[Icarus]

I am going to replace the 02's in the 95 this weekend. Ive been noticing decreasing fuel economy, and think that at 90,000 miles.....they are due.


I am ALSO having the stumbling issue when cold and all that jazz. Really kinda pisses me off. I let the car idle for a few minutes to let the enging get *some* heat in it.......but doesnt help.

It will fall on it's face at anything above 1/4 throttle before it is "warmed up".

I just did my coil on plug swap which did'nt help anything but the part throttle stuble when cold(burnt wire).

this friday im doing

Plugs
O2's
Air filter
Fuel Filter
and an oil change.


We will see what happens.

Mike

So how did it turn out?