Downstream O2 sensors
Thread Starter
Intermediate
Joined: Nov 2024
Posts: 29
Likes: 0
From: Cracow
Downstream O2 sensors
Hello
Can anyone know is possible to buy a link harness to swap downstream sensors to upstream ones with a flat plug? I need to know i can buy somewhere harness with a square 4 pin plug and on opposite side flat 4 pin socket with lenght of circa 800 mm. My intension is to replace AFS 108 sensor with AFS75. Reason is i can buy easily AFS75 and AFS108 in unavailable here in poland. Funny is that AFS75 was in Daewoo Lanos, FSO / Daewoo Polonez, Opel / Vauxhall / Holden Astra. AFS 108 is dedicated to LS Engine application, also checked SAAB 9X Aero with LS1 but there is no same plugs.
Thanks for any web links to this harness if exists.
Can anyone know is possible to buy a link harness to swap downstream sensors to upstream ones with a flat plug? I need to know i can buy somewhere harness with a square 4 pin plug and on opposite side flat 4 pin socket with lenght of circa 800 mm. My intension is to replace AFS 108 sensor with AFS75. Reason is i can buy easily AFS75 and AFS108 in unavailable here in poland. Funny is that AFS75 was in Daewoo Lanos, FSO / Daewoo Polonez, Opel / Vauxhall / Holden Astra. AFS 108 is dedicated to LS Engine application, also checked SAAB 9X Aero with LS1 but there is no same plugs.
Thanks for any web links to this harness if exists.
Instructor
Joined: Nov 2004
Posts: 239
Likes: 35
From: Dubai
Thread Starter
Intermediate
Joined: Nov 2024
Posts: 29
Likes: 0
From: Cracow
Thank you for the reply, but this product is not i have mentioned. Upstream o2 sensor has a flat connector female, downstream square female, so then you need female square to male flat adapting wiring with c.a. 40 inch lenght to compensate shorter wires of upstream sensor.
Instructor
Joined: Nov 2004
Posts: 239
Likes: 35
From: Dubai
Thank you for the reply, but this product is not i have mentioned. Upstream o2 sensor has a flat connector female, downstream square female, so then you need female square to male flat adapting wiring with c.a. 40 inch lenght to compensate shorter wires of upstream sensor.
Ahmad
Race Director
Joined: Oct 2004
Posts: 12,864
Likes: 4,669
Why screw around like this? Have the rear O2s (after cats) tuned out, if that is what you're trying to do. Leave the forward sensors (before the cats) in place with their appropriate harness. Am I missing something here? Don't buy O2 Sims. All that does is send the ECM into a constant hunt for the correct AFR.......
Team Owner
Joined: Oct 1999
Posts: 31,977
Likes: 487
From: Guinness Its whats for B'fast JAWGA
CI 3-4-5-9 Veteran
Thread Starter
Intermediate
Joined: Nov 2024
Posts: 29
Likes: 0
From: Cracow
Nooo, my sensors are working and are not tuned out. I must bring this car working with euro 4 instead of California Emission Tier 1. On Polish market the downstream sensors are unavailable - so the my idea was to replace them by upstram ones, because they're was installed among lot of cars of GM / as i mentioned Daewoo, Polonez, Opel etc. I can buy bosch replacement easily and very cheap. So that why i would replace lambdas. I didnt mentioned to tune it out and install emulators. So to make Euro 4 emisssion standard i will do the equivalency certificate by DEKRA and try to convinct the autorities to register this car as E4. All around the EU EcoTerrorism is developping an that's a problem - mostly clean zones. If i can recertificate this car then i have unlimited entrance to the Cracow city, where i live. SInce today i have replaced and tightened vacuum lines, upstream oxygen sensors to bosch OE equivalent, and catalysts, but on the diagnostics emissions i see to more oxygen instead of 1.04 i see 2.5 where is the leak? All connections are thight in the exhaust. And front sensors floating from 0-1 second on idle are standing on 0.1 mV, when crusing 0,7 mV. Other solutuion for this ecoproblem is to buy C7, but i like this C5.....
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Team Owner
Joined: Oct 1999
Posts: 31,977
Likes: 487
From: Guinness Its whats for B'fast JAWGA
CI 3-4-5-9 Veteran
Nooo, my sensors are working and are not tuned out. I must bring this car working with euro 4 instead of California Emission Tier 1. On Polish market the downstream sensors are unavailable - so the my idea was to replace them by upstram ones, because they're was installed among lot of cars of GM / as i mentioned Daewoo, Polonez, Opel etc. I can buy bosch replacement easily and very cheap. So that why i would replace lambdas. I didnt mentioned to tune it out and install emulators. So to make Euro 4 emisssion standard i will do the equivalency certificate by DEKRA and try to convinct the autorities to register this car as E4. All around the EU EcoTerrorism is developping an that's a problem - mostly clean zones. If i can recertificate this car then i have unlimited entrance to the Cracow city, where i live. SInce today i have replaced and tightened vacuum lines, upstream oxygen sensors to bosch OE equivalent, and catalysts, but on the diagnostics emissions i see to more oxygen instead of 1.04 i see 2.5 where is the leak? All connections are thight in the exhaust. And front sensors floating from 0-1 second on idle are standing on 0.1 mV, when crusing 0,7 mV. Other solutuion for this ecoproblem is to buy C7, but i like this C5.....
The diagrams in the links below may help.
https://www.ls1lt1.com/threads/o2-sensor-wiring.46542/
https://www.corvetteforum.com/forums...worthless.html
Thread Starter
Intermediate
Joined: Nov 2024
Posts: 29
Likes: 0
From: Cracow
BTW are you able to write me down values of the emissions for this car? NOx =? SOx = ? CO = ? , CO2=? and O2 =? per 1 mile for NB6 California Emissions Tier 1? I have contacted EPA and they sended me lot of data i dont understand.
Thread Starter
Intermediate
Joined: Nov 2024
Posts: 29
Likes: 0
From: Cracow
Yes i can repin this harness and elongate it. That is good idea to buy needed plugs and sockets and done this adapter / extension line by myself. But you have mentioned about heaters they are stronger than in the front sensors. And i thing is a good reason to import Denso or bosch equivalent to Delco AFS108 form Summit Racing to PL.
Team Owner
Joined: Oct 1999
Posts: 31,977
Likes: 487
From: Guinness Its whats for B'fast JAWGA
CI 3-4-5-9 Veteran
Agreed, I'd import the sensor. Summit does ship international.
No idea on the emissions. Being a domestic car, we do not have to deal with it. Further some US state do not even require a yearrly emissions while others regulate what we can legally do to modify our cars. You may find more information asking European Corvette owners. I'd love to help more but finding this Federal information from the bureaucrats is not easy.
https://www.corvetteclub.org.uk/thre...and-ulez.1789/
No idea on the emissions. Being a domestic car, we do not have to deal with it. Further some US state do not even require a yearrly emissions while others regulate what we can legally do to modify our cars. You may find more information asking European Corvette owners. I'd love to help more but finding this Federal information from the bureaucrats is not easy.
https://www.corvetteclub.org.uk/thre...and-ulez.1789/
Thread Starter
Intermediate
Joined: Nov 2024
Posts: 29
Likes: 0
From: Cracow
Thanks for the link, i will ask Brits for the resolution they chose to avoid ULEZ in London.
With end of the year i want to wish you Merry Christmas and Happy New Year with more corvettes than ever!
With end of the year i want to wish you Merry Christmas and Happy New Year with more corvettes than ever!