Long tubes with cats/Disappearing CEL? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Drewcifer · 02-23-2017, 07:41 PM

Recently I had a set of Stainless Works long tube catted headers installed along with a drop in K&N filter element. I drove it the first day or 2 with the CEL on until I could get it tuned. Great power and sound. Yesterday I noticed the CEL was gone. Same today. Is this a temporary thing? Anybody else experience this? Thoughts.....?

BubbaSS · 02-23-2017, 08:54 PM

Probably o2 sensor related. You should have the code read next time to be sure, but it's normal to get an o2 code intermittently after hi flow cat install. The tune should remove the cel if done properly.

Gunmetal Speedster · 02-23-2017, 10:11 PM

Mostly like o2 related as stated. Hi flows have a chance, albeit a smaller one than the catless route, to throw an o2 sensor code. The car will turn the CEL off after a few drive cycles if it doesn't see the problem again. It's only a matter of time before it returns. Best way to go about it is getting them tuned out. That way you can also maximize the most power out of them with the tune as well.

Drewcifer · 02-24-2017, 02:04 AM

Ya. I'm getting the tune in about a week. It'll be interesting to see if the CEL returns. I had a 10 SS that had 27k MI on it when I got it and I put OBX R long tube and hi flow cats on with a K&N filter and the CEL stayed on steadily. I'm surprised it turned off with this car. This is a 14 with only 6k miles on it. Better headers though for sure. Thanks for the input

christianchevell · 02-25-2017, 10:31 AM

delayed response from o2s, remove o2s at rear needed in tune along with removing part of code showing the fronts delayed response due to their being farther away....

DokWatson · 02-25-2017, 01:24 PM

Both my car and truck don't care about not having cats, only threw codes once or twice then never came back. Don't know why, never cared! I'd imagine you'd be in even better shape having cats.

BubbaSS · 02-25-2017, 03:23 PM

Quote:

Originally Posted by DokWatson

Both my car and truck don't care about not having cats, only threw codes once or twice then never came back. Don't know why, never cared! I'd imagine you'd be in even better shape having cats.

He has hi flows

Drewcifer · 02-26-2017, 01:43 AM

Ya guys. Day 4 and still the code has not returned. I'm still going to tune it but it sure is nice not having to look at it until i do

Drewcifer · 02-26-2017, 05:36 PM

This morning I drove my car on the freeway and the CEL came back on. Oh well. Soon to tune

Test_Eng · 02-26-2017, 05:47 PM

Black tape mod or get a tune. Very rare to see anyone install headers on these cars and not get a CEL. Had the same problem when I bought my car used from the dealer. Original owner installed kooks long headers and a K&N CAI. The light came on as soon as I pulled out of the dealer but never came on during the test drive.

To get the most out of the mod a Tune is required and more importantly in my case I need to pass emissions so it was a no brainer.

Sent from my iPhone using Tapatalk

BubbaSS · 02-26-2017, 08:19 PM

Quote:

Originally Posted by Test_Eng

Black tape mod or get a tune. Very rare to see anyone install headers on these cars and not get a CEL. Had the same problem when I bought my car used from the dealer. Original owner installed kooks long headers and a K&N CAI. The light came on as soon as I pulled out of the dealer but never came on during the test drive.

To get the most out of the mod a Tune is required and more importantly in my case I need to pass emissions so it was a no brainer.

Sent from my iPhone using Tapatalk

In my opinion, getting the cel is a good sign that your cats are better flowing. If you never get the cel, then the airflow must be similar to stock.

Drewcifer · 02-26-2017, 09:43 PM

Good points on both. A tune is definitely in the works. I've got a guy willing to do $400 unlimited tunes for as long as I have the car. Setting up for 1st week of March. The light was still on when I drove home. Guess I can live with it 1 more week.

ARuiz9 · 02-28-2017, 02:02 PM

Quote:

Originally Posted by Test_Eng

Black tape mod or get a tune. Very rare to see anyone install headers on these cars and not get a CEL. Had the same problem when I bought my car used from the dealer. Original owner installed kooks long headers and a K&N CAI. The light came on as soon as I pulled out of the dealer but never came on during the test drive.

To get the most out of the mod a Tune is required and more importantly in my case I need to pass emissions so it was a no brainer.

Sent from my iPhone using Tapatalk

What's the black tape mod? And will your car pass emissions after/if the rear o2 are shut off?

Juiced1 · 02-28-2017, 02:13 PM

Waiting a bit to get your tune won't hurt anything. But keep in mind you're leaving power on the table and generally running very rich before the tune.

02-23-2017, 07:41 PM	#1
Drewcifer Drives: 2014 Camaro SS Join Date: Jan 2017 Location: Yuma, AZ. Posts: 15	Long tubes with cats/Disappearing CEL? Recently I had a set of Stainless Works long tube catted headers installed along with a drop in K&N filter element. I drove it the first day or 2 with the CEL on until I could get it tuned. Great power and sound. Yesterday I noticed the CEL was gone. Same today. Is this a temporary thing? Anybody else experience this? Thoughts.....?

02-23-2017, 08:54 PM	#2
BubbaSS WHAT RED LIGHT?! Drives: 2011 Black Camaro 2SS/RS M6 Join Date: Apr 2011 Location: Miami, Florida Posts: 1,115	Probably o2 sensor related. You should have the code read next time to be sure, but it's normal to get an o2 code intermittently after hi flow cat install. The tune should remove the cel if done properly. __________________ 2011 2SS/RS M6 BLACK - VARARAM NO TUNE INTAKE, MODDED AND PORTED TB, PORTED INTAKE MANIFOLD, VITESSE THROTTLE CONTROLLER, DOUG THORLEY LT'S, CATLESS, X-PIPE, 25" STAINLESS WORKS RETRO CHAMBERED MUFFLERS, CUSTOM 2.5" MANDREL BENT EXHAUST, RICHMOND 4.10 GEARS, CUSTOM CAM (231/242 @ 114LSA), MUSTANG DYNO TUNED BY TORQ, 20% CERAMIC TINTS, EIBACH PROKIT SPRINGS 1" DROP, HAWK PERFORMANCE CERAMIC BRAKES, NITTO INVO TIRES, HYDROCARBON TAIL LIGHT AND FOG LIGHT BEZELS BY EMBLEMPROS, METRA DASH KIT, JVC KW-AV71BT, PHOENIX GOLD iAMP GM1, PASSPORT QI45 - 450 RWHP 415 RWTQ

02-23-2017, 10:11 PM	#3
Gunmetal Speedster Drives: Savitar; The 500rwhp N/A Monster! Join Date: Aug 2016 Location: Middletown, Ohio Posts: 2,914 View My Garage	Mostly like o2 related as stated. Hi flows have a chance, albeit a smaller one than the catless route, to throw an o2 sensor code. The car will turn the CEL off after a few drive cycles if it doesn't see the problem again. It's only a matter of time before it returns. Best way to go about it is getting them tuned out. That way you can also maximize the most power out of them with the tune as well. __________________ **SOLD504HP/433**TQ \| Night Fury cammed • Cold Air Inductions intake • Bo White ported TB • Speed Engineering 1 7/8 longtubes • NPP catback • QTP low profile cutouts • Powerbond 25% UDP • 3.73 gears • JRE scoop • ZL1 grille • R1 Concepts drilled/slotted rotors • built/tuned by Weapon X Motorsports Instagram \| YouTube \| Build Thread

02-25-2017, 10:31 AM	#5
christianchevell old school chevy rodder Drives: 2013 2SS/RS Manual,DM exhaust,CRT Join Date: Jul 2012 Location: Oregon Posts: 5,588 View My Garage	delayed response from o2s, remove o2s at rear needed in tune along with removing part of code showing the fronts delayed response due to their being farther away.... __________________ 2021 Wild Cherry ZL1 A10, Sunroof, Data, Carbon, Nav, RotoFab Dry CAI, Elite x2, Borla ATK, Driveshaft shop

02-25-2017, 01:24 PM	#6
DokWatson Dok Drives: 2015 Camaro 1LS M6 Join Date: Apr 2016 Location: Alaska Posts: 188	Both my car and truck don't care about not having cats, only threw codes once or twice then never came back. Don't know why, never cared! I'd imagine you'd be in even better shape having cats. __________________ Hoonigan/Technician Check out my channel. https://www.youtube.com/user/AK49Watson

02-24-2017, 02:04 AM	#4
Drewcifer Drives: 2014 Camaro SS Join Date: Jan 2017 Location: Yuma, AZ. Posts: 15	Ya. I'm getting the tune in about a week. It'll be interesting to see if the CEL returns. I had a 10 SS that had 27k MI on it when I got it and I put OBX R long tube and hi flow cats on with a K&N filter and the CEL stayed on steadily. I'm surprised it turned off with this car. This is a 14 with only 6k miles on it. Better headers though for sure. Thanks for the input

02-26-2017, 01:43 AM	#8
Drewcifer Drives: 2014 Camaro SS Join Date: Jan 2017 Location: Yuma, AZ. Posts: 15	Day 4 and no CEL Ya guys. Day 4 and still the code has not returned. I'm still going to tune it but it sure is nice not having to look at it until i do

02-26-2017, 05:36 PM	#9
Drewcifer Drives: 2014 Camaro SS Join Date: Jan 2017 Location: Yuma, AZ. Posts: 15	And it's back This morning I drove my car on the freeway and the CEL came back on. Oh well. Soon to tune

02-26-2017, 05:47 PM	#10
Test_Eng Drives: 2013 1SS RS 1LE NPP ADM LSA CON Join Date: Mar 2014 Location: Western Maryland Posts: 194	Black tape mod or get a tune. Very rare to see anyone install headers on these cars and not get a CEL. Had the same problem when I bought my car used from the dealer. Original owner installed kooks long headers and a K&N CAI. The light came on as soon as I pulled out of the dealer but never came on during the test drive. To get the most out of the mod a Tune is required and more importantly in my case I need to pass emissions so it was a no brainer. Sent from my iPhone using Tapatalk

02-26-2017, 09:43 PM	#12
Drewcifer Drives: 2014 Camaro SS Join Date: Jan 2017 Location: Yuma, AZ. Posts: 15	Good points on both. A tune is definitely in the works. I've got a guy willing to do $400 unlimited tunes for as long as I have the car. Setting up for 1st week of March. The light was still on when I drove home. Guess I can live with it 1 more week.

02-28-2017, 02:13 PM	#14
Juiced1 Account Suspended Drives: 2012 2SS CAMARO 45th Join Date: Apr 2011 Location: St. Charles, IL Posts: 18,663	Waiting a bit to get your tune won't hurt anything. But keep in mind you're leaving power on the table and generally running very rich before the tune.