solution for check engine light with header? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

alkemyst · 03-27-2008, 07:47 AM

I have an OBDII 240sx and the header replaces the cat. What is everyone doing to get rid of the check engine light ?

Also is it just a code or does it throw the engine into a limp mode/etc.

Thanks

Å

projectRDM · 03-27-2008, 07:51 AM

Rear O2 is for diagnostics only. All you'll get is a CEL without it, or with it seeing an improper reading.

Just as it's been discussed many times before, replace the exhaust resonator with a functioning cat, like a Random Tech piece, and weld a bung in the back side of it for the O2. Extend the wiring a bit and thread it in. All it's looking for is a change between emissions level from the primary O2.

rican_nick · 03-27-2008, 08:20 AM

we installed O2 simulators on my buddies IS they worked fine. Another option.

alkemyst · 03-27-2008, 11:08 AM

anyone try this method on a 240? http://www.s2ki.com/forums/index.php...9&hl=simulator

alkemyst · 03-27-2008, 11:37 AM

Quote:

Originally Posted by projectRDM

Rear O2 is for diagnostics only. All you'll get is a CEL without it, or with it seeing an improper reading.

Just as it's been discussed many times before, replace the exhaust resonator with a functioning cat, like a Random Tech piece, and weld a bung in the back side of it for the O2. Extend the wiring a bit and thread it in. All it's looking for is a change between emissions level from the primary O2.

The bung thing I thought about, but it looks like the 3" catco I am looking at doesn't have enough meat for a bung...I'd rather not have the shop hack into whatever cat-back I decide on.

03-27-2008, 07:47 AM	#1
alkemyst Zilvia Addict Join Date: Oct 2003 Location: Florida Age: 53 Posts: 868 Trader Rating: (0) Feedback Score: 0 reviews	solution for check engine light with header? I have an OBDII 240sx and the header replaces the cat. What is everyone doing to get rid of the check engine light ? Also is it just a code or does it throw the engine into a limp mode/etc. Thanks Å __________________ Now my Kensai, I curse you to be a Ronin and with the my remaining spirit I, beseech Chimata-No-Kami, to have you wander through time and distance lands, seeking a new master.

03-27-2008, 07:51 AM	#2
projectRDM Post Whore! Join Date: Dec 2002 Location: Atlanta Age: 51 Posts: 13,812 Trader Rating: (12) Feedback Score: 12 reviews	Rear O2 is for diagnostics only. All you'll get is a CEL without it, or with it seeing an improper reading. Just as it's been discussed many times before, replace the exhaust resonator with a functioning cat, like a Random Tech piece, and weld a bung in the back side of it for the O2. Extend the wiring a bit and thread it in. All it's looking for is a change between emissions level from the primary O2. __________________ FORMERLY R240NA Learn what's really going on and protect your assets now before they're gone forever: www.paypalsucks.com

03-27-2008, 08:20 AM	#3
rican_nick Zilvia FREAK! Join Date: May 2003 Location: Augusta, GA Age: 42 Posts: 1,204 Trader Rating: (0) Feedback Score: 0 reviews	we installed O2 simulators on my buddies IS they worked fine. Another option. __________________ Nick O. 97 240sx My Seller's Review Thread

03-27-2008, 11:08 AM	#4
alkemyst Zilvia Addict Join Date: Oct 2003 Location: Florida Age: 53 Posts: 868 Trader Rating: (0) Feedback Score: 0 reviews	anyone try this method on a 240? http://www.s2ki.com/forums/index.php...9&hl=simulator __________________ Now my Kensai, I curse you to be a Ronin and with the my remaining spirit I, beseech Chimata-No-Kami, to have you wander through time and distance lands, seeking a new master.