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.

 

https://www.michiganmotorsports.com/...VEpWh5xTDOvUYZ

 

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.

 

If you are going to use the long wire downstream sensors as upstream sensors so you need this adapter .


Ahmad

 

Hello Ahmad

Yes i would use upstream sensor in place of downstream.... so i need use short sensor with a flat connector.

BR Piotr S.

 

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.......

 

That is the recipe to run the rear O2s with the better heater in the front. If you need more wire to move the rear further back, Michigan Motorsports has that harness too

 

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.....

 

Ahh ok, I doubt a harness is on the market. You could make harness depinning to get the connector to make your own. EFI Connection likely has the connectors and wire for sale or they could likely make it custom order. Also as mentioned above, of local laws allow you can set the rear O2s to non reporting with a retune.

The diagrams in the links below may help.
https://www.ls1lt1.com/threads/o2-sensor-wiring.46542/
https://www.corvetteforum.com/forums...worthless.html

 

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.

 

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.

 

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/

 

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!