Secondary Cats HELP

DanielZ · 07-11-2019, 12:27 PM

Hey Guys,

Having one heck of a time getting secondary cats taken off the car. Going to leave the muffler with NPP on. From what I've seen and heard, I think that's better than going secondary cat and muffler delete. What are your guys' thoughts?

My main question is this: Does ANYONE have any reference that I can use to get this done ASAP (Im in NorCal Walnut Creek/Concord area. Will travel). I've tried 6+ shops. Nothing. No cash/no receipt didn't work.

Lastly, wanted to wait for longtubes until I save up for cam, heads, tuning, etc.

Thanks,

Gunkk · 07-11-2019, 12:41 PM

Why?

grampa_ss · 07-11-2019, 12:50 PM

Don't tell the shop they're CATs, tell them they're resonators. I've heard that works sometimes.

coruiz · 07-11-2019, 01:01 PM

Quote:

Originally Posted by grampa_ss

Don't tell the shop they're CATs, tell them they're resonators. I've heard that works sometimes.

yea that worked for me

DanielZ · 07-11-2019, 01:14 PM

Quote:

Originally Posted by coruiz

yea that worked for me

I tried that at a couple but from how they answered, it seemed like they had heard that many times before. Lol. Shot it down immediately.

grampa_ss · 07-11-2019, 01:49 PM

Try a local mom 'n pop shop in the shady part of town.

joe944 · 07-11-2019, 02:09 PM

Try Life's Good Racing in Livermore?

staples87 · 07-11-2019, 02:29 PM

Don't put any shops on blast on here. Keep it through PM if you're going to mention shops to try. You could get them in trouble and that would also hurt the community.

DanielZ · 07-11-2019, 07:05 PM

Quote:

Originally Posted by staples87

Don't put any shops on blast on here. Keep it through PM if you're going to mention shops to try. You could get them in trouble and that would also hurt the community.

Quote:

Originally Posted by grampa_ss

Try a local mom 'n pop shop in the shady part of town.

Big thank you to everyone for the tips and recommendations on places to chat with. Car is breathing much better as of today.

JMM_SS · 07-21-2019, 02:19 AM

Now that they are gone any check engine light? I have had mine removed for a few days and just got a light on. I think it means the welds are bad.

enzia35 · 07-21-2019, 07:01 AM

Yes, no 2nd cats will pop a CEL. Doesn't necessarily mean the welds are bad.

Joshinator99 · 07-21-2019, 07:40 AM

Quote:

Originally Posted by enzia35

Yes, no 2nd cats will pop a CEL. Doesn't necessarily mean the welds are bad.

No, it won’t. The secondary cats are not monitored by the ECM (no O2 sensors after them). Removing them does not set a CEL. If your CEL is on, something else is the issue, exhaust leak being the most common after that type of work.

JMM_SS · 07-21-2019, 02:48 PM

Thank you guys for the answers. I have another question. My check engine light came last night from the little exhaust leak. Then this morning when i fired it up the car went instantly into limp home mode..... after i shut off the car and turned it back on everything was normal. Has that ever happened to anybody?

chaospiece · 07-21-2019, 04:20 PM

Bad welds. Your o2 sensors are getting fresh air from a gap in the welding.
I've had my 2018 off over a year and no CEL.

07-11-2019, 12:27 PM	#1
DanielZ Drives: 2017 Camaro ZL1 - Summit White Join Date: Jul 2019 Location: Bay Area - California Posts: 41	Secondary Cats HELP Hey Guys, Having one heck of a time getting secondary cats taken off the car. Going to leave the muffler with NPP on. From what I've seen and heard, I think that's better than going secondary cat and muffler delete. What are your guys' thoughts? My main question is this: Does ANYONE have any reference that I can use to get this done ASAP (Im in NorCal Walnut Creek/Concord area. Will travel). I've tried 6+ shops. Nothing. No cash/no receipt didn't work. Lastly, wanted to wait for longtubes until I save up for cam, heads, tuning, etc. Thanks,

07-11-2019, 12:50 PM	#3
grampa_ss Drives: 2016 Camaro 2SS Join Date: Apr 2017 Location: Stansbury Park, Utah Posts: 1,092	Don't tell the shop they're CATs, tell them they're resonators. I've heard that works sometimes. __________________ 2016 2SS, MRC, NPP, A8. Procharger P-1X,Stage II,std bypass, 3.9, Alky Meth - 10.84 @129 - DA+2000 New Mods - GPI drop ins, Kooks 2", LT4 fueling, Cam, Circle D Converter, 3.5 pulley & dual nozzle meth.

07-11-2019, 01:49 PM	#6
grampa_ss Drives: 2016 Camaro 2SS Join Date: Apr 2017 Location: Stansbury Park, Utah Posts: 1,092	Try a local mom 'n pop shop in the shady part of town. __________________ 2016 2SS, MRC, NPP, A8. Procharger P-1X,Stage II,std bypass, 3.9, Alky Meth - 10.84 @129 - DA+2000 New Mods - GPI drop ins, Kooks 2", LT4 fueling, Cam, Circle D Converter, 3.5 pulley & dual nozzle meth.

07-11-2019, 02:29 PM	#8
staples87 Drives: 2017 Camaro ZL1 Join Date: Aug 2018 Location: Bel Air, MD Posts: 319	Don't put any shops on blast on here. Keep it through PM if you're going to mention shops to try. You could get them in trouble and that would also hurt the community. __________________ '17 Camaro ZL1 M6

07-21-2019, 07:01 AM	#11
enzia35 Drives: '16 Garnet Red 1SS Join Date: Mar 2014 Location: College Station, TX Posts: 3,450	Yes, no 2nd cats will pop a CEL. Doesn't necessarily mean the welds are bad. __________________ '16 Camaro 1SS '18 Miata GT Gone: '01 Camaro, '14 Camaro, '90 Miata

07-11-2019, 12:41 PM	#2
Gunkk Thank you Al Oppenheiser! Drives: Red Hot A10 ZL1 Convertible Join Date: Jun 2017 Location: Sarasota, FL Posts: 4,974 View My Garage	Why?

07-11-2019, 02:09 PM	#7
joe944 Drives: 18' A10 ZL1 , 18' F150, 04' MSM Join Date: May 2018 Location: Bay Area, California Posts: 178	Try Life's Good Racing in Livermore?

07-21-2019, 02:19 AM	#10
JMM_SS Drives: 2018 Camaro 2SS Join Date: Feb 2019 Location: CA Posts: 29	Now that they are gone any check engine light? I have had mine removed for a few days and just got a light on. I think it means the welds are bad.

07-21-2019, 02:48 PM	#13
JMM_SS Drives: 2018 Camaro 2SS Join Date: Feb 2019 Location: CA Posts: 29	Thank you guys for the answers. I have another question. My check engine light came last night from the little exhaust leak. Then this morning when i fired it up the car went instantly into limp home mode..... after i shut off the car and turned it back on everything was normal. Has that ever happened to anybody?

07-21-2019, 04:20 PM	#14
chaospiece Drives: 2018 SS, 2016 GT Join Date: Mar 2018 Location: California Posts: 210	Bad welds. Your o2 sensors are getting fresh air from a gap in the welding. I've had my 2018 off over a year and no CEL.

User Name		Remember Me?
Password