[GST-Eclipse]

When i am logging my car i get the fuel trims and everything but how do i know if the o2 sensor is out. Will it stop giving me anything at all or what? Thanks.

 

[SeatownGST]

Your values will be REALLY screwed up, and your car will protect itself by running rich, but it will be difficult to detect by a logger, but by nose and MPG still works !

I've heard that the normal oscillation of rich-lean-rich-lean values at idle will be effected, and that's a good first sign that the O2 sensor is failing.

 

[GST-Eclipse]

well my car is running super rich, actually theres gas in my oil. I thought it was because of the walbro though. Which i have also already ordered an AFPR. Maybe i should get a new one for the hell of it. I only have to get the one on the o2 housing right? and not the one on the DP? Thanks

 

[SeatownGST]

The AFPR will definitely have a HUGE impact on your situation. That was exactly what I was going to post, sounds like you are running rich no matter what. And yes, the upper O2 housing-based sensor is the one that would probably be shot, the second one downstream just throws out CELs if your cat is clogged (or not there for some folks).

Which A-FPR are you going to get ? As a stop-gap, can you remove that super mega pump and go back to stock, or to a smaller one ?

 

[GST-Eclipse]

well as of now im sporting in a 1991 ford escort gt, lol. So i dont have to run it like that intill i get the AFPR. The one i have ordered is the Charged Air one. I have a test pipe for my cat and dont get any CEL so you think that one is shot also or is it normal for some not to get CEL's? Thanks

 

[95tsiawdgst]

When i am logging my car i get the fuel trims and everything but how do i know if the o2 sensor is out. Will it stop giving me anything at all or what? Thanks.

From my experience, the car will shoot soot out the back when its cold.
When I logged it, the front o2 would bounce here and there(randomly) and the rear o2 was pegged rich all the time.