header install o2 sensor question
Thread Starter
Instructor
Joined: Dec 2008
Posts: 163
Likes: 22
From: Riverview FL
header install o2 sensor question
I am about to install the headers on my c6. the headers are american racing i dont have the 02 extenders but today is the only day i have to put the headers on. if i install the headers can i put the front o2 sensor extenders(the ones that go in the header) on while it is on the car and not connect the rear and get them removed with a custom tune?
Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
Your car will run fine with just the front 02 sensors in and plug the rear and tune them out.
I'm sort of confused by your post though. Do you not have extensions for the front 02 sensors yet? Your car will not be happy if you drive it with no 02's plugged in.
I'm sort of confused by your post though. Do you not have extensions for the front 02 sensors yet? Your car will not be happy if you drive it with no 02's plugged in.
Thread Starter
Instructor
Joined: Dec 2008
Posts: 163
Likes: 22
From: Riverview FL
npe i dont have them yet and i have to put the headers in today no choice it will be weeks before i can do it again. i just want to make sure that when i get the extenders most likely tomorrow i can put them in easily with the new headers already installed.
Thread Starter
Instructor
Joined: Dec 2008
Posts: 163
Likes: 22
From: Riverview FL
got the headers on last night no probelm with no o2 sensors drove home about 40 miles without a check engine light some how and now i am waiting for the extenders for the front so i can get it running right.
Thread Starter
Instructor
Joined: Dec 2008
Posts: 163
Likes: 22
From: Riverview FL
Melting Slicks
Joined: Feb 2004
Posts: 3,307
Likes: 110
From: Tucson AZ
You probably should not run the engine without the front O2 sensors connected. The ECU will go into open loop, but the O2 sensors need 12v power to keep them clean.
The rear O2 sensors are just used for a cat check and you can run fine without them, although they will set a code unless tuned out.
The rear O2 sensors are just used for a cat check and you can run fine without them, although they will set a code unless tuned out.
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Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
I don't think that is a true statement! You need extensions for all four sensors. The Front O2 sensors are in the OEM exhaust manifolds. The ARH O2 sensors are on the collectors.
OEM Stuff:
Look at the OEM exhaust manifold and you can see the O2 sensor pig tail. It connects to a plug under the fuel rail cover. No way that plug under the cover will reach the collector.
I installed these headers and it dynoed at 365 RWHP 360 RWTQ. It ran PIG rich and I was experiencing spark knock around 5500 rpm. I had it tuned by Chuck @ Corvettes of Westchester and the difference is AMAZING. Im guessing I have around 380-390 RWHP. Have not had a chance to get back to the dyno.
BC
OEM Stuff:
Look at the OEM exhaust manifold and you can see the O2 sensor pig tail. It connects to a plug under the fuel rail cover. No way that plug under the cover will reach the collector.
I installed these headers and it dynoed at 365 RWHP 360 RWTQ. It ran PIG rich and I was experiencing spark knock around 5500 rpm. I had it tuned by Chuck @ Corvettes of Westchester and the difference is AMAZING. Im guessing I have around 380-390 RWHP. Have not had a chance to get back to the dyno.
BC
Last edited by Bill Curlee; Nov 13, 2009 at 12:12 AM.
Safety Car
Joined: Sep 2008
Posts: 4,296
Likes: 156
From: Location: Location: kAnSaS
I just installed my American racing system yesterday. It cam with and needed all 4 extended. The rears had heat resistant covering. The front dont need that since they dont run very close to the headers
Racer
Joined: Sep 2018
Posts: 326
Likes: 18
From: Colorado
Rear sensors
Sorry im a bit late to this conversation lol...so im in the same Scenario as the OP i only have extensions for the 2 front sensors and plan on tune deleting the 2 rears since im going catless, can i just plug the rears from the x pipe and put aside the harness connections or something?
Advanced
Joined: Mar 2013
Posts: 59
Likes: 13
From: Pineville La
Sorry im a bit late to this conversation lol...so im in the same Scenario as the OP i only have extensions for the 2 front sensors and plan on tune deleting the 2 rears since im going catless, can i just plug the rears from the x pipe and put aside the harness connections or something?
