Welcome to Ultimate Subaru Message Board, my lurker friend!
|Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.
We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!
Serving the Subaru Community since May 18th, 1998!
O2 sensor anti-fouler trick
Posted 22 December 2009 - 04:48 AM
Prefer an answer from someone knowledgable than guesses..no offense to anyone
Posted 22 December 2009 - 11:57 AM
Posted 23 December 2009 - 12:11 AM
If you were to use an anti fouler on the front O2 sensor there is a good change the car would not run correctly. The ECU would get an extremely lean reading from the sensor and try to enrich the A/F ratio until the sensor reads correctly. Which would actually make the mixture extremely rich.
Posted 23 December 2009 - 01:57 AM
You could completely remove the rear O2 sensor and besides a code P0420 you would see absolutely no change whatsoever in the fuel consumption. The engine would continue to run in closed loop operation from the single front sensor.
Posted 23 December 2009 - 07:17 AM
Posted 23 December 2009 - 08:26 AM
Posted 23 December 2009 - 02:29 PM
And the CEL is lit
So, are we saying that if the rear is shot...the anti fouler would solve the lite as well as having normal gas mileage?
And if it is the front that is bad...putting the anti fouler in the rear will change nothing (lite will stay on)?
I could dump 200+ by buying both from the west coast...but I have more in this baby than it is worth....block from CCR...valve job, brakes all around a bit of body work...the works.
I would love to avoid another expense
Posted 23 December 2009 - 02:45 PM
do the anti-fouler.
if you still have the code, get a new sensor.
if you don't like the gas mileage, get a new sensor.
the antifouler isn't going to affect gas mileage but will protect you from unwanted CEL's.
Posted 23 December 2009 - 03:26 PM
If you still have the code invest in the $8 anti-fouler.
Or better yet - do them both at the same time so you don't have to worry about it.
It sounds like you have been WAY to nice to that car. It's an old car and it's not going to hurt to use non-OEM parts on a few things. This aint the space shuttle - don't treat it like it is. There *are* things I will only buy from the dealer but when there are good alternatives I will take them.
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users