Headers: Has the CEL "issue" been solved? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

boredom.is.me · 10-20-2013, 01:29 PM

Without getting a tune, how would one go about getting rid of the check engine light after getting headers?

Kev

And yes I did search.

SliverBrz · 10-20-2013, 01:32 PM

well you didn't search enough lol

you use whats called an "02 spacer" or defouler, all it does is push the sensor out of the stream of the exhaust flow

boredom.is.me · 10-20-2013, 02:11 PM

I guess I didn't.

raytrix · 10-20-2013, 02:11 PM

Defouler causes sensor reading irregularities making it reading lean and telling the car to add more fuel to compensate till it reads the amount it needs.

IAmNotTheDriftKing · 10-20-2013, 02:25 PM

I know you need an 02 spacer(or a tune) to get rid of the CEL, but I was wondering if this will cause any problems in the long run?

SloS14 · 10-20-2013, 02:26 PM

Quote:

Originally Posted by raytrix

Defouler causes sensor reading irregularities making it reading lean and telling the car to add more fuel to compensate till it reads the amount it needs.

Why would someone put a defouler on their primary o2 sensor?

raytrix · 10-20-2013, 03:39 PM

Defouler aka spacer aka 90 degree bent fitting.

PantsDants · 10-20-2013, 05:00 PM

Another thing you can try is relocating the secondary O2 sensor behind the cat in your front pipe. Weld a bung, extend the wires, profit. The primary O2 sensor needs to stay in its current position though.

This information was garnered from other posts here and is not my own experience, so take it with a grain of salt. This is my plan if I decide to go with a non-catted header, in addition to tuning the cat inefficiency code out.

FR-S Matt · 10-20-2013, 09:33 PM

Tune is best. Welding an O2 bung behind the front pipe car and wire extensions works well too. Spacer is hit or miss. I prefer the options in the order I listed regardless if it was said to not tune. Headers are crap without a tune. These aren't big block V8's.

SmsAlSuwaidi · 10-20-2013, 09:35 PM

The o2 spacer does not always work PERIOD

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10-20-2013, 01:32 PM	#2
SliverBrz Senior Member Join Date: Apr 2013 Drives: Silver 2013 BRZ limited Location: Los angeles Posts: 801 Thanks: 45 Thanked 184 Times in 125 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	well you didn't search enough lol you use whats called an "02 spacer" or defouler, all it does is push the sensor out of the stream of the exhaust flow

10-20-2013, 02:11 PM	#4
raytrix Senior Member Join Date: Aug 2013 Drives: Series 10 FR-S Location: Chicago Posts: 480 Thanks: 234 Thanked 380 Times in 151 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	Defouler causes sensor reading irregularities making it reading lean and telling the car to add more fuel to compensate till it reads the amount it needs.

10-20-2013, 02:25 PM	#5
IAmNotTheDriftKing Senior Member Join Date: Feb 2013 Drives: I own an FR-S. . . whatelse! Location: Northwest Indiana Posts: 318 Thanks: 114 Thanked 140 Times in 84 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I know you need an 02 spacer(or a tune) to get rid of the CEL, but I was wondering if this will cause any problems in the long run?

10-20-2013, 03:39 PM	#7
raytrix Senior Member Join Date: Aug 2013 Drives: Series 10 FR-S Location: Chicago Posts: 480 Thanks: 234 Thanked 380 Times in 151 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	Defouler aka spacer aka 90 degree bent fitting.

10-20-2013, 05:00 PM	#8
PantsDants Senior Member Join Date: Jul 2013 Drives: Scion FR-S A/T, Whiteout Location: Seattle Posts: 334 Thanks: 57 Thanked 221 Times in 90 Posts Mentioned: 16 Post(s) Tagged: 2 Thread(s)	Another thing you can try is relocating the secondary O2 sensor behind the cat in your front pipe. Weld a bung, extend the wires, profit. The primary O2 sensor needs to stay in its current position though. This information was garnered from other posts here and is not my own experience, so take it with a grain of salt. This is my plan if I decide to go with a non-catted header, in addition to tuning the cat inefficiency code out.

10-20-2013, 09:35 PM	#10
SmsAlSuwaidi Boosted Join Date: Feb 2013 Drives: Not a supra....yet Location: Riverside,CA/ Abu Dhabi,UAE Posts: 2,925 Thanks: 487 Thanked 1,203 Times in 812 Posts Mentioned: 90 Post(s) Tagged: 2 Thread(s)	The o2 spacer does not always work PERIOD

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