Fabspeed Sport Cats - CEL
Melting Slicks
Joined: Jun 2001
Posts: 2,266
Likes: 550
https://www.vehicleservicepros.com/s...sfire-concerns This article, is using narrow band 02 as a basis. Straight from the article. "I began teaching this technique to Ford technicians in the Advanced Drivability courses starting in 2000" That was over 20 years ago.
Last edited by itsonlyairandfuel; Apr 23, 2023 at 04:15 PM. Reason: spelling
Safety Car
Joined: Jul 2019
Posts: 4,079
Likes: 2,415
From: Florida
https://www.vehicleservicepros.com/s...sfire-concerns This article, is using narrow band 02 as a basis. Straight from the article. "I began teaching this technique to Ford technicians in the Advanced Drivability courses starting in 2000" That was over 20 years ago.
from another source...
Burning Brakes
Joined: Dec 2007
Posts: 761
Likes: 335
From: Charlotte NC
Not according to the folks that design our and others engine management. Check it out on HP tuners though
That book was written by the actual engine management designers.
I've seen it many times personally now.
Another article although not as good as the book from Bosch, Simos, etc...
https://www.vehicleservicepros.com/s...sfire-concerns
It is typical to see the downstream sensor voltage floating in the 350 to 650mV range when the cat is lit off, the system is in closed loop and there are no misfires or other concerns. In fact, most manufacturers monitor the downstream oxygen sensors and will tweak LTFT to improve fuel
That book was written by the actual engine management designers.
I've seen it many times personally now.
Another article although not as good as the book from Bosch, Simos, etc...
https://www.vehicleservicepros.com/s...sfire-concerns
It is typical to see the downstream sensor voltage floating in the 350 to 650mV range when the cat is lit off, the system is in closed loop and there are no misfires or other concerns. In fact, most manufacturers monitor the downstream oxygen sensors and will tweak LTFT to improve fuel
I'll amend my statement -- downstream O2 readings do not have a meaningful impact to trims.
Advanced
Joined: Jan 2024
Posts: 50
Likes: 6
I only had drivers side that was throwing code, did use O2 extender and CEL is gone - 500 miles and many starts and CEL is still off, so think the problem is gone - but I too bought them because of "quality and no CEL promise" which in my 22's C8 proved to not be true.....
Racer
Joined: May 2012
Posts: 323
Likes: 55
St. Jude Donor '12-'13-'14
Good luck - I know it is maddening -
Advanced
Joined: Jan 2024
Posts: 50
Likes: 6
Racer
Joined: May 2012
Posts: 323
Likes: 55
St. Jude Donor '12-'13-'14
Advanced
Joined: Jan 2024
Posts: 50
Likes: 6
ok so just get 1 not 2? also do i get the 45 degrees or 90 degrees. thanks a lot for the help i appreciate it.
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Racer
Joined: May 2012
Posts: 323
Likes: 55
St. Jude Donor '12-'13-'14
is your code only for drivers side? Forget what code, but it will say what side - hope it is drivers as that was "easy" to get too - I believe the passenger side would require some R&R some parts - drivers was reachable with wrench to just remove O2 and install the extender - don't remember if I had 45 or 90 - might call Fabspeed on Monday and also ask about your engine (thinking for some reason you said Z06) will clear with extenders..... GL