need some help guys - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

tartagliazl1 · 10-05-2025, 12:03 PM

so, a couple weeks ago while drive home for a cars and coffee event the car dies while driving. service stabilatrack and park assist, abs lights come on. I was able to coast into a parking lot. car restarts after a couple of tries. now while driving on the expressway doing 70 into a turn i hit a bump and all the lights come back for a second car stumbles bad and comes back to normal. so, I get the car home and when I hit the road gutter with the front driver wheel the car dies again and all the light come back. now I changed the front speed sensors thinking that those failed. but now the car dies instantly when I put it into reverse, and the service brake assist light come on. Not sure where to look. battery is good 1 year old. I was thinking wiring issue since it started doing it when I hit bumps. but now I'm not sure.

I have codes uo100 and uo101 communication issues.

tartagliazl1 · 10-05-2025, 12:05 PM

Oh and i also have this going on wtf. I think I’m blowing out the guts of the muffler.

tartagliazl1 · 10-05-2025, 01:43 PM

i figured it out. it was the large 0 gauge ground wire that is on the side of the passenger head. the bolt backed out. that was easy. now what do i do with the muffler?

xstuntman · 10-05-2025, 02:11 PM

A lot of ZL1 mufflers were replaced while under warranty for blowing out the packing. I would cut it off and wait to see if it blows more and if so the sound might get too obnoxious.

A trick back in the day was to pack too loud mufflers with steel wool or better yet stainless steel wool to reduce the sound and less LEO attention/less tickets.

tartagliazl1 · 10-05-2025, 02:54 PM

Quote:

Originally Posted by xstuntman

A lot of ZL1 mufflers were replaced while under warranty for blowing out the packing. I would cut it off and wait to see if it blows more and if so the sound might get too obnoxious.

A trick back in the day was to pack too loud mufflers with steel wool or better yet stainless steel wool to reduce the sound and less LEO attention/less tickets.

I think i will eventually cut the muffler open and do the npp mod. Basically open it up take the packing out and weld a solid pipe in place of the perforated section.

*mlee* · 10-06-2025, 04:07 PM

Time for a nice axle or catback exhaust

tartagliazl1 · 10-06-2025, 06:27 PM

I’ll like to pass on paying $2k on an exhaust system, especially when Chevy did such a great job with the NPP system. Plus the car is loud enough lol

*mlee* · 10-07-2025, 08:48 AM

Quote:

Originally Posted by tartagliazl1

I’ll like to pass on paying $2k on an exhaust system, especially when Chevy did such a great job with the NPP system. Plus the car is loud enough lol

I see that good job they did with the suitcase under there.

MBRP is only $750 https://www.phastekperformance.com/M...t-s7036409.htm

tartagliazl1 · 10-07-2025, 03:12 PM

Quote:

Originally Posted by mlee

I see that good job they did with the suitcase under there.

MBRP is only $750 https://www.phastekperformance.com/M...t-s7036409.htm

The 6th gen has the suitcase exhaust. The blow out was due to my loose ground wire causing the stabilitrack, abs, to come on and sending my trans haywire while doing 70 on the expressway. The trans went from 6th gear doing 70 to downshift to 3rd gear and causing a massive burble through the exhaust. I think that massive pressure caused the blowout.

Joe.G · 10-08-2025, 09:29 AM

I happen to think the NPP is one of the better sounding exhausts out there for these cars and they look nice as well. Size wise they are fine as well. Glad you found your issue as my suggestion was going to be check your grounds. The packing was an issue and you can mod them like you stated, iv seen some posts on it and you tube videos. My Buddies brand new Ford pickup just did the same thing, He called me and said someone stuffed a hair weave in his exhaust while he was at the gym lol. I told him to come over and it was packing and not a weave.

tartagliazl1 · 10-08-2025, 12:12 PM

Quote:

Originally Posted by Joe.G

I happen to think the NPP is one of the better sounding exhausts out there for these cars and they look nice as well. Size wise they are fine as well. Glad you found your issue as my suggestion was going to be check your grounds. The packing was an issue and you can mod them like you stated, iv seen some posts on it and you tube videos. My Buddies brand new Ford pickup just did the same thing, He called me and said someone stuffed a hair weave in his exhaust while he was at the gym lol. I told him to come over and it was packing and not a weave.

That’s funny cause, when i first seen it the car was running and i thought it was a stuck bird lol

10-05-2025, 12:03 PM	#1
tartagliazl1 Drives: 2013 zl1 vert Join Date: Dec 2018 Location: Rochester, New york Posts: 1,162	need some help guys so, a couple weeks ago while drive home for a cars and coffee event the car dies while driving. service stabilatrack and park assist, abs lights come on. I was able to coast into a parking lot. car restarts after a couple of tries. now while driving on the expressway doing 70 into a turn i hit a bump and all the lights come back for a second car stumbles bad and comes back to normal. so, I get the car home and when I hit the road gutter with the front driver wheel the car dies again and all the light come back. now I changed the front speed sensors thinking that those failed. but now the car dies instantly when I put it into reverse, and the service brake assist light come on. Not sure where to look. battery is good 1 year old. I was thinking wiring issue since it started doing it when I hit bumps. but now I'm not sure. I have codes uo100 and uo101 communication issues. __________________ 22% lower/ 2.5 upper/ 2” headers/ cat delete/ x-pipe/ 2 gallon x tank/ 100-3 pump/ fic 1300/ dsx aux kit/ 103mm throttle body/ big gulp 5” intake/ meth kit/ prometh lid injection/FI interchiller/ 160* stat/ ngk-7/ msd wires/ elite catch can/ tsp cam/ Che trunnions/ ported supercharger/ 1/2” lid spacer/ cnc,milled ported heads/ brick mod/BMR toe and trailing arms/ 781hp 748 tq SAE @17.3lb on a loaded dyno.

10-05-2025, 12:05 PM	#2
tartagliazl1 Drives: 2013 zl1 vert Join Date: Dec 2018 Location: Rochester, New york Posts: 1,162	Oh and i also have this going on wtf. I think I’m blowing out the guts of the muffler. Attached Images __________________ 22% lower/ 2.5 upper/ 2” headers/ cat delete/ x-pipe/ 2 gallon x tank/ 100-3 pump/ fic 1300/ dsx aux kit/ 103mm throttle body/ big gulp 5” intake/ meth kit/ prometh lid injection/FI interchiller/ 160* stat/ ngk-7/ msd wires/ elite catch can/ tsp cam/ Che trunnions/ ported supercharger/ 1/2” lid spacer/ cnc,milled ported heads/ brick mod/BMR toe and trailing arms/ 781hp 748 tq SAE @17.3lb on a loaded dyno.

10-05-2025, 01:43 PM	#3
tartagliazl1 Drives: 2013 zl1 vert Join Date: Dec 2018 Location: Rochester, New york Posts: 1,162	i figured it out. it was the large 0 gauge ground wire that is on the side of the passenger head. the bolt backed out. that was easy. now what do i do with the muffler? __________________ 22% lower/ 2.5 upper/ 2” headers/ cat delete/ x-pipe/ 2 gallon x tank/ 100-3 pump/ fic 1300/ dsx aux kit/ 103mm throttle body/ big gulp 5” intake/ meth kit/ prometh lid injection/FI interchiller/ 160* stat/ ngk-7/ msd wires/ elite catch can/ tsp cam/ Che trunnions/ ported supercharger/ 1/2” lid spacer/ cnc,milled ported heads/ brick mod/BMR toe and trailing arms/ 781hp 748 tq SAE @17.3lb on a loaded dyno.

10-05-2025, 02:11 PM	#4
xstuntman Drives: 2012 Victory Red LFX Join Date: Dec 2012 Location: west central Texas Posts: 1,342	A lot of ZL1 mufflers were replaced while under warranty for blowing out the packing. I would cut it off and wait to see if it blows more and if so the sound might get too obnoxious. A trick back in the day was to pack too loud mufflers with steel wool or better yet stainless steel wool to reduce the sound and less LEO attention/less tickets. __________________ '18 SS wheels, colored matched Heritage grille, actual driving lights, ZL1 strut tower brace, GM Performance billet aluminum fuel door, victory red rotors and calipers, 1/4 window American flags, splash guards, AEM dry panel air filter, Hot Wheels steering wheel and seat covers, Hot Wheels exterior emblems. Last edited by xstuntman; 10-05-2025 at 02:26 PM.

10-06-2025, 04:07 PM	#6
mlee CamaroFans.com Drives: ZLE & ZR2 Join Date: Oct 2008 Location: Conroe, TX Posts: 37,945 View My Garage	Time for a nice axle or catback exhaust __________________

10-06-2025, 06:27 PM	#7
tartagliazl1 Drives: 2013 zl1 vert Join Date: Dec 2018 Location: Rochester, New york Posts: 1,162	I’ll like to pass on paying $2k on an exhaust system, especially when Chevy did such a great job with the NPP system. Plus the car is loud enough lol __________________ 22% lower/ 2.5 upper/ 2” headers/ cat delete/ x-pipe/ 2 gallon x tank/ 100-3 pump/ fic 1300/ dsx aux kit/ 103mm throttle body/ big gulp 5” intake/ meth kit/ prometh lid injection/FI interchiller/ 160* stat/ ngk-7/ msd wires/ elite catch can/ tsp cam/ Che trunnions/ ported supercharger/ 1/2” lid spacer/ cnc,milled ported heads/ brick mod/BMR toe and trailing arms/ 781hp 748 tq SAE @17.3lb on a loaded dyno.

10-08-2025, 09:29 AM	#10
Joe.G Drives: 2014 2SS/RS 6SP Ashen Grey Join Date: Aug 2021 Location: NY Posts: 1,661	I happen to think the NPP is one of the better sounding exhausts out there for these cars and they look nice as well. Size wise they are fine as well. Glad you found your issue as my suggestion was going to be check your grounds. The packing was an issue and you can mod them like you stated, iv seen some posts on it and you tube videos. My Buddies brand new Ford pickup just did the same thing, He called me and said someone stuffed a hair weave in his exhaust while he was at the gym lol. I told him to come over and it was packing and not a weave. __________________ GM 3.91/TrueTrac OEM ZL1 Rims, 6 Piston Brakes & Side Skirts.ACST4 Splitter/Deflectors NPP M2W,GM Short Throw,GPI Ported Rod Mod,BO White PTB,CAI/JRE Scoop, GC Aluminum DS,Stainless Works Ceramic LTH/HiFlo Cats, Hotckis 1" Springs & Chassis Max Brace BMR Adjustable Swaybars,Trailing Arms, Adjustable Toe Rod, LCA & Z28 UCA Bushings Hendrix Solid Cradle Bushings Pedders Radius Rod Inserts Strut tower brace, Moroso Catch Can,SCT X4 Dynosteve,Remote Clutch reservoir,Hero Smoked Tail and 3rd Brake Light, Diode Dynamic SL1 Fog Lights AeroForce Dual gauge/Autometer pillar mount.