Weird exhaust shit

Royalpotato · 05-05-2022, 10:26 AM

So I have a v6 camaro and I’m doing a straight pip on it but I noticed a valve in the middle of the exhaust not doing anything but it has a spring holding it shut. However because the straight pipe it’s floating open and vibrates and makes an annoying noise. I’m considering welding it open or cuting it out but does anyone know what the purpose of the valve is (it’s not an npp exhaust)

dmcmahan60 · 05-05-2022, 01:50 PM

AFM valves. Active Fuel Management valves, when it switches to 4 cylinder mode. My guess but I could be wrong.

TXCSSU · 05-05-2022, 06:15 PM

Based on the title, I thought this was a thread about Taco Bell...

95 imp · 05-05-2022, 10:24 PM

Quote:

Originally Posted by TXCSSU

Based on the title, I thought this was a thread about Taco Bell...

If that were the case, the valve would be stuck open and act like straight dumps....

cjperformance · 05-06-2022, 06:43 AM

oh the imagery

Royalpotato · 05-06-2022, 08:19 AM

Quote:

Originally Posted by TXCSSU

Based on the title, I thought this was a thread about Taco Bell...

10/10 most helpful

TXCSSU · 05-06-2022, 01:41 PM

Quote:

Originally Posted by Royalpotato

10/10 most helpful

I figure if anything, you'd get a free bump, kinda like after eating at Taco Hell, and then the sphincter needing to be addressed.

RegularJohn86278263789 · 05-06-2022, 02:51 PM

Quote:

Originally Posted by TXCSSU

I figure if anything, you'd get a free bump, kinda like after eating at Taco Hell, and then the sphincter needing to be addressed.

DESGOSTANG!

FlukeSS · 05-06-2022, 02:56 PM

Quote:

Originally Posted by TXCSSU

I figure if anything, you'd get a free bump, kinda like after eating at Taco Hell, and then the sphincter needing to be addressed.

icwutudidther

arpad_m · 05-06-2022, 03:02 PM

OP's username is a perfect Taco Bell match, too

Alas, my serious mood all but turned into vapor the moment I saw "straight pip".

Sorry OP, promise I won't troll further into your thread.

Trochoidal · 05-06-2022, 04:01 PM

Quote:

Originally Posted by James Montigny

That is your active fuel management valve. It will throw a code if you remove it without a tune. You can cut it off, unscrew the control module and zip tie it to the frame to keep the PCM happy.

My guess is that your straight pipe setup would benefit from a resonator to take the edge off of the rasp without hurting performance.

Would this also require the AWE AFM simulator?

Quote:

Originally Posted by 95 imp

If that were the case, the valve would be stuck open and act like straight dumps....

“DUMPS”!!

cellsafemode · 05-08-2022, 12:57 AM

the spring activated afm valves do not throw codes nor have any sensor or electronic features that could throw a code. all they do is react to pulses from v4 mode to muffle them so v4 mode is smoother sounding. without them v4 mode sounds obvious (to those within the car)

you can remove them just fine if you want. but straight pipe and the lgx make for a poor sound and horrible quality of life driving for any amount of time but it's your car.

Bumbleboy92 · 05-09-2022, 12:59 PM

Can confirm about the spring valves not throwing codes. Mine started making noise like yours and I had them cut out without issue. I do have AFM tuned out so I don’t need them anyways.

RideWithDanger · 05-29-2022, 02:02 PM

I want cut cut mine out but was going to (steel) zip tie them temporarily to make sure there wernt any noticeable issues. Is there a certain way to do it properly to make sure they remain fully open?

05-05-2022, 10:26 AM	#1
Royalpotato Drives: 2019 camaro V6 Join Date: Nov 2019 Location: SC Posts: 18	Weird exhaust shit So I have a v6 camaro and I’m doing a straight pip on it but I noticed a valve in the middle of the exhaust not doing anything but it has a spring holding it shut. However because the straight pipe it’s floating open and vibrates and makes an annoying noise. I’m considering welding it open or cuting it out but does anyone know what the purpose of the valve is (it’s not an npp exhaust)

05-06-2022, 06:43 AM	#5
cjperformance Drives: 2017 Camaro SS 50th Anniversary Join Date: Apr 2021 Location: Missouri Posts: 929	oh the imagery __________________ 2017 50th Anniversary Edition \| P1X Stage 2 DSX Aux Low Side \| LT4 high side \| Flex Fuel TooHighPsi Port Injection (installed & tuning) CircleD 3K Stall \| QA1 CF Driveshaft Forgestar F14 Drag 17x10 NT555R2 305/45/17 Rear Forgestar F14 18x8 NT555G2 235/50/18 Front 10.84@131 w/4.13" pulley ??.??@??? w/3.7" pulley (installed & tuning)

05-06-2022, 03:02 PM	#10
arpad_m Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017 Location: East Tennessee Posts: 11,601 View My Garage	OP's username is a perfect Taco Bell match, too Alas, my serious mood all but turned into vapor the moment I saw "straight pip". Sorry OP, promise I won't troll further into your thread. __________________ 2018 Camaro 2SS — G7E MX0 NPP F55 IO6 735 rwhp \| 665 rwtq Magnuson TVS 2300 80mm pulley \| Kooks 1 7/8" LT headers \| JRE smooth idle terminator cam \| LT4 FS & injectors \| TSP forged pistons & rods JMS PowerMAX \| DSX flex fuel kit \| Roto-Fab CAI \| Soler 95mm LT5 TB \| 1LE wheels \| 1LE brakes \| BMR rear cradle lockout \| JRE custom tune 1100 - 1/30/18 \| 2000 - 1/31/18 3000 - 2/06/18 TPW 2/26/18 3400 - 2/19/18 \| 3800 - 2/26/18 4300 - 2/27/18 \| 4B00 - 3/01/18 4200 - 3/05/18 \| 4800 - 3/14/18 5000 - 3/16/18 \| 6000 - 3/19/18

05-09-2022, 12:59 PM	#13
Bumbleboy92 Long hauler Drives: 2022 Camaro 2SS 1LE Join Date: Mar 2017 Location: Houston, TX Posts: 1,617 View My Garage	Can confirm about the spring valves not throwing codes. Mine started making noise like yours and I had them cut out without issue. I do have AFM tuned out so I don’t need them anyways. __________________ 2022 2SS 1LE - Cold Air Inductions Elite Carbon CAI 2016 1LT v6 - Totaled Happiness: Infinite

05-29-2022, 02:02 PM	#14
RideWithDanger Drives: 23 2SS 1LE Join Date: Feb 2019 Location: GA Posts: 569	I want cut cut mine out but was going to (steel) zip tie them temporarily to make sure there wernt any noticeable issues. Is there a certain way to do it properly to make sure they remain fully open? __________________ Instagram: RideWithDanger Radiant Red 23' 2SS 1LE 1100: 11/14/22 \| BUILT: 3/16/23 2000: 2/17/23 \| 4200: 5/8/23 3000: 2/27/23 \| 5000/6000: 5/15/23 Black on black 2019 3LT RS Camaro. 1100: 3/7/19 \| 4200: 4/15/19 3100: 3/15/19 \| 4800: 4/23/19 3400: 3/22/19 \| 5000: 4/25/19 Built: 4/8/19 \| Home: 4/26/19

05-05-2022, 01:50 PM	#2
dmcmahan60 Drives: 2017 SS Join Date: Jan 2018 Location: Arab, AL Posts: 760 View My Garage	AFM valves. Active Fuel Management valves, when it switches to 4 cylinder mode. My guess but I could be wrong.

05-05-2022, 06:15 PM	#3
TXCSSU Account Suspended Drives: 2022 ZL1 M6/Nissan Leaf Join Date: May 2016 Location: Dallas Posts: 1,138	Based on the title, I thought this was a thread about Taco Bell...

05-08-2022, 12:57 AM	#12
cellsafemode Drives: 2016 Camaro 1LT Join Date: Jan 2016 Location: California Posts: 3,491	the spring activated afm valves do not throw codes nor have any sensor or electronic features that could throw a code. all they do is react to pulses from v4 mode to muffle them so v4 mode is smoother sounding. without them v4 mode sounds obvious (to those within the car) you can remove them just fine if you want. but straight pipe and the lgx make for a poor sound and horrible quality of life driving for any amount of time but it's your car.

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