no cel after catless header install - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

vestal52 · 05-19-2014, 04:58 PM

ok I just recently installed an OFH about 2 weeks ago, drive it every day with prolly a little over 100 miles yet no cel? I haven't tuned it either, will be getting on oft soon anyways.

just wondering why my car hasn't put out the CEL, thought it was going to happen since everyone seems to get it right after header install

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ramiram1984 · 05-19-2014, 05:03 PM

every car/eng is diff...

Efferalgan · 05-19-2014, 05:12 PM

Maybe you are just lucky?

In fact, CEL usually pops-up after some prolonged drive with stable speed and RPMs - like 20-30 km motorway ride. If you do just town rides with stop-and-go traffic it might not appear at all. But, as rightly said above, it's case-by-case and depends whether you are lucky or not

vestal52 · 05-19-2014, 05:30 PM

ok thanks, trying to figure out if I have a leak as well.

idle it's quiet, but under acceleration it sounds like its breathing/ blowing air.

not sure if that's normal or what not

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ramiram1984 · 05-19-2014, 05:38 PM

Quote:

Originally Posted by vestal52

ok thanks, trying to figure out if I have a leak as well.

idle it's quiet, but under acceleration it sounds like its breathing/ blowing air.

not sure if that's normal or what not

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Get under your car and feel for exhaust leak...better if you had access to a lift.

SirBrass · 05-19-2014, 05:59 PM

Quote:

Originally Posted by vestal52

ok I just recently installed an OFH about 2 weeks ago, drive it every day with prolly a little over 100 miles yet no cel? I haven't tuned it either, will be getting on oft soon anyways.

just wondering why my car hasn't put out the CEL, thought it was going to happen since everyone seems to get it right after header install

Sent from my iPhone using Tapatalk

Mine didn't throw a CEL until quite a while later (say about a half week to a week), and then after it was cleared it was actually close to a month till it threw the CEL again.

Trunksse · 05-19-2014, 06:07 PM

Quote:

Originally Posted by vestal52

ok thanks, trying to figure out if I have a leak as well.

idle it's quiet, but under acceleration it sounds like its breathing/ blowing air.

not sure if that's normal or what not

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I am thinking its normal from the noise generator as I have the same noise with mine but I have no leaks. Also the blowing sound is only heard in the cabin, but not on the outside.

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vestal52 · 05-20-2014, 01:43 AM

Quote:

Originally Posted by Trunksse

I am thinking its normal from the noise generator as I have the same noise with mine but I have no leaks. Also the blowing sound is only heard in the cabin, but not on the outside.

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so it's normal? well I'll check tomorrow first thing in the morning for leaks anyways.

never had that sound before the header was put in, how would that be able to affect the noise generator in the cabin?

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Trunksse · 05-20-2014, 09:10 AM

I think so, but others can with the header can also verify. There is a hole in the cabin where the noises come from; I am planning on plugging that up to see if it helps with that. Also, I recently realize the noise is there with stock, just that it's very very faint, you can barely hear it.

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FR-S Matt · 05-20-2014, 09:13 AM

It will eventually throw a CEL, but the amount of miles may vary when it does. It all depends on when the rear O2 starts reading the same flow pattern as the primary O2 then you will see the light come on and the engine will run in a closed loop mode real rich. It normally happens when you are cruising at the same speed down the highway for a good period of time rather than WOT or just simply shifting gears.

calibrz · 05-20-2014, 02:43 PM

CEL will be going on depends how soon the sensor takes it.

NoobTron · 05-20-2014, 11:32 PM

I have a Borla catless.. Loud in a odd way for about a week before the Ecu "settled" and went about 3-4 weeks before I threw a CEL.

uspspro · 05-20-2014, 11:39 PM

I have almost a year without the CEL

Fortis · 05-22-2014, 02:52 AM

Slightly OT but do you guys think a front pipe with a 200 cell cat or even a catless FP would throw a CEL without a tune?

05-19-2014, 04:58 PM	#1
vestal52 Member Join Date: Dec 2013 Drives: Whiteout FRS Location: Reseda,CA Posts: 41 Thanks: 6 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	no cel after catless header install ok I just recently installed an OFH about 2 weeks ago, drive it every day with prolly a little over 100 miles yet no cel? I haven't tuned it either, will be getting on oft soon anyways. just wondering why my car hasn't put out the CEL, thought it was going to happen since everyone seems to get it right after header install Sent from my iPhone using Tapatalk

05-20-2014, 02:43 PM	#11
calibrz Turbo 86 Join Date: May 2014 Drives: GT86 Location: Japan now Posts: 167 Thanks: 3 Thanked 35 Times in 23 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	CEL will be going on depends how soon the sensor takes it. __________________ 10 - 1 = 0 real math

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05-19-2014, 05:12 PM	#3
Efferalgan Senior Member Join Date: Sep 2012 Drives: 2025 BRZ, ex-2012 GT86 Location: Dubai Posts: 466 Thanks: 422 Thanked 234 Times in 139 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	Maybe you are just lucky? In fact, CEL usually pops-up after some prolonged drive with stable speed and RPMs - like 20-30 km motorway ride. If you do just town rides with stop-and-go traffic it might not appear at all. But, as rightly said above, it's case-by-case and depends whether you are lucky or not

05-19-2014, 05:30 PM	#4
vestal52 Member Join Date: Dec 2013 Drives: Whiteout FRS Location: Reseda,CA Posts: 41 Thanks: 6 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	ok thanks, trying to figure out if I have a leak as well. idle it's quiet, but under acceleration it sounds like its breathing/ blowing air. not sure if that's normal or what not Sent from my iPhone using Tapatalk

05-20-2014, 09:10 AM	#9
Trunksse Member Join Date: Dec 2012 Drives: Firestorm FR-S Location: South FL Posts: 21 Thanks: 23 Thanked 13 Times in 7 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	I think so, but others can with the header can also verify. There is a hole in the cabin where the noises come from; I am planning on plugging that up to see if it helps with that. Also, I recently realize the noise is there with stock, just that it's very very faint, you can barely hear it. Sent from my Nexus 7 using Tapatalk

05-20-2014, 11:32 PM	#12
NoobTron Member Join Date: Apr 2014 Drives: 2014 Scion FRS, Argento, 6MT Location: Athens, GA Posts: 28 Thanks: 3 Thanked 40 Times in 12 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I have a Borla catless.. Loud in a odd way for about a week before the Ecu "settled" and went about 3-4 weeks before I threw a CEL.

05-20-2014, 11:39 PM	#13
uspspro Senior Member Join Date: Mar 2012 Drives: DGM BRZ, MR-S 3.5L V6 swap (sold) Location: Bay Area, CA Posts: 602 Thanks: 28 Thanked 188 Times in 121 Posts Mentioned: 1 Post(s) Tagged: 1 Thread(s)	I have almost a year without the CEL

05-22-2014, 02:52 AM	#14
Fortis Senior Member Join Date: Feb 2014 Drives: 2014 FR-S AT Asphalt Location: East Bay, CA Posts: 346 Thanks: 126 Thanked 195 Times in 100 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Slightly OT but do you guys think a front pipe with a 200 cell cat or even a catless FP would throw a CEL without a tune?

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