FUEL MANAGEMENT AND WIERD SOUND OF EXHAUST - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

taspec · 08-12-2009, 01:13 PM

I OWN A 2010 CAMARO SS , V8 L99 ENGINE, AUTOMATIC TRANSMISSION, WE ONLY CUT THE REAR MUFFLER AND REPLACED FOR A STRAIGHT TUBE JUST TO MAKE MORE MUSCLE CAR SOUND. THE PROBLEM IS WHEN THE CAR GOES IN 4 CILINDER MODE (AFM)_MAKES AND UGLY NOISE WITH VIBRATION. THERE IS ANY WAY TO FIX THIS? I READ THAT GM DOESN'T OFFER A FIX, HAVE ANY OF YOU HEARD ANYTHING ABOUT THIS?

CamaroSkooter · 08-12-2009, 02:01 PM

Seriously, what's with people and the Caps Lock button?

And no, haven't heard of this before.

Scott@Bjorn3D · 08-12-2009, 02:25 PM

Just talked to GM engineers about this yesterday. They need lots of exhaust volume area to deadend the 4 cylinder sound. Guess what you cut out your mufflers and just got rid of a lot of volume area.

There will be no fix for that from GM.

King Mouse · 08-12-2009, 02:25 PM

You can get your AFM tuned out. It will fix this.

Shadowmind · 08-12-2009, 02:40 PM

This is posted in another thread...

http://www.camaro5.com/forums/showthread.php?t=36816

Scott@Bjorn3D · 08-12-2009, 02:41 PM

"You can get your AFM tuned out. It will fix this."

And say goodbye to your drive train warranty.

King Mouse · 08-12-2009, 02:46 PM

You will get the car you really wanted

*CamaroSpike23* · 08-12-2009, 03:59 PM

Quote:

Originally Posted by King Mouse

You will get the car you really wanted

with no coverage from GM if something randomly goes boom.

vdevine · 08-12-2009, 04:23 PM

Scott is right about the mufflers.

Or, you can go to M in sport mode and paddle shift which will affect your mileage a little.

baby02 · 08-28-2009, 10:21 PM

I don't get it. the new Hemi has a fuel management system, and it doesn't have any of the problems this Camaro has. I own both, made the same changes to both cars. the hemi improved, no hesitation, no noises. the hemi fuel management doesn't kick in until you reach criusing speeds. This should be an easy fix for Gm.

IrishmanMP · 09-25-2009, 05:53 PM

I have this same problem. If you barely get on it no matter what gear as long as it is around a grand you get exhaust drone. I took it to a dealer and they have a bulletin put out on it. They told me the same thing as some of the other posts. That it is in fact the AFM System. That if you put it into M that it will eliminate the noise. The thing that is irritating me is that you shouldn't have to in order to solve the problem. They said that there isn't a fix for it, although it isn't hurting anything. Anyone else come across a solution for this other that driving in M?

BigJoe · 09-25-2009, 07:33 PM

Just keep your foot in it all the time, then you'll never hear it.

IrishmanMP · 09-25-2009, 08:43 PM

Quote:

Originally Posted by BigJoe

Just keep your foot in it all the time, then you'll never hear it.

Yeah see that is the thing... There are ways around the problem. There is no denying that. The thing is that there shouldn't be a problem to begin with. There is no solution to fixing the actual problem besides covering it up or avoiding it.

jbsrace1 · 09-25-2009, 09:19 PM

Program and set it to deactivate below 55mph (stock it is set at 9mph). Works like a charm and still get good gas mileage on the highway

08-12-2009, 01:13 PM	#1
taspec Drives: 2010 camaro SS/RS Join Date: Jul 2009 Location: miami Posts: 4	FUEL MANAGEMENT AND WIERD SOUND OF EXHAUST I OWN A 2010 CAMARO SS , V8 L99 ENGINE, AUTOMATIC TRANSMISSION, WE ONLY CUT THE REAR MUFFLER AND REPLACED FOR A STRAIGHT TUBE JUST TO MAKE MORE MUSCLE CAR SOUND. THE PROBLEM IS WHEN THE CAR GOES IN 4 CILINDER MODE (AFM)_MAKES AND UGLY NOISE WITH VIBRATION. THERE IS ANY WAY TO FIX THIS? I READ THAT GM DOESN'T OFFER A FIX, HAVE ANY OF YOU HEARD ANYTHING ABOUT THIS?

08-12-2009, 04:23 PM	#9
vdevine Drives: 2010 Black SS Join Date: Jun 2009 Location: Virginia Posts: 605 View My Garage	Scott is right about the mufflers. Or, you can go to M in sport mode and paddle shift which will affect your mileage a little. __________________ Vince SS2 Black with CGM Stripes 3800 Born: 25 May VIN#12136 6000 Mine 26 June 2009 SLP Loudmouth II, NOWEEDS, BMR 1.4/1.0 Lowering Springs, Cold Air Inductions Intake, Tune, Eagle Eyes w HID, SLP "SS" Grille Insert, Pistol Grip Shifter, Hawk PC Pads, RGB Scanner, Tint, Headlight Armor, Clear Bra, 22's.

09-25-2009, 07:33 PM	#12
BigJoe Drives: 2010 Camaro 2SS/RS (10/17/2009) Join Date: Sep 2009 Location: West Virginia Posts: 43	Just keep your foot in it all the time, then you'll never hear it. __________________ 2SS/RS L99 A6 CGM/white rally stripe, Black interior, Polished wheels, Heritage grill w/69 "SS" emblem and Pistol grip shifter by George Carter Fabrication and Design. Ordered 08/31/2009 Delivered 10/15/2009 Serial# 52,222

08-12-2009, 02:01 PM	#2
CamaroSkooter Retarded One-Legged Owl Drives: 2010 Black Camaro 2SS Join Date: Oct 2008 Location: San Antonio, TX Posts: 9,745	Seriously, what's with people and the Caps Lock button? And no, haven't heard of this before.

08-12-2009, 02:25 PM	#3
Scott@Bjorn3D Drives: Kami, 2013 2SS LS3 Luvin Join Date: Oct 2008 Location: Eufaula, Alabama Posts: 6,427	Just talked to GM engineers about this yesterday. They need lots of exhaust volume area to deadend the 4 cylinder sound. Guess what you cut out your mufflers and just got rid of a lot of volume area. There will be no fix for that from GM.

08-12-2009, 02:25 PM	#4
King Mouse Drives: EXT Join Date: Nov 2008 Location: Western PA Posts: 416	You can get your AFM tuned out. It will fix this.

08-12-2009, 02:40 PM	#5
Shadowmind Drives: 2010 2SS - IOM, fully loaded Join Date: May 2009 Location: Seattle WA Posts: 216	This is posted in another thread... http://www.camaro5.com/forums/showthread.php?t=36816

08-12-2009, 02:41 PM	#6
Scott@Bjorn3D Drives: Kami, 2013 2SS LS3 Luvin Join Date: Oct 2008 Location: Eufaula, Alabama Posts: 6,427	"You can get your AFM tuned out. It will fix this." And say goodbye to your drive train warranty.

08-12-2009, 02:46 PM	#7
King Mouse Drives: EXT Join Date: Nov 2008 Location: Western PA Posts: 416	You will get the car you really wanted

08-28-2009, 10:21 PM	#10
baby02 EYE CANDY Drives: 1SS RS ABM Join Date: Aug 2009 Location: Port St Lucie, fl Posts: 673 View My Garage	I don't get it. the new Hemi has a fuel management system, and it doesn't have any of the problems this Camaro has. I own both, made the same changes to both cars. the hemi improved, no hesitation, no noises. the hemi fuel management doesn't kick in until you reach criusing speeds. This should be an easy fix for Gm.

09-25-2009, 05:53 PM	#11
IrishmanMP Freedom isn't free... Drives: V-8 2SS R/S Camaro Red Jewel Join Date: Sep 2009 Location: Alexandria, Virginia Posts: 11 View My Garage	I have this same problem. If you barely get on it no matter what gear as long as it is around a grand you get exhaust drone. I took it to a dealer and they have a bulletin put out on it. They told me the same thing as some of the other posts. That it is in fact the AFM System. That if you put it into M that it will eliminate the noise. The thing that is irritating me is that you shouldn't have to in order to solve the problem. They said that there isn't a fix for it, although it isn't hurting anything. Anyone else come across a solution for this other that driving in M?

09-25-2009, 09:19 PM	#14
jbsrace1 Drives: 2010 2ss Join Date: Aug 2009 Location: Georgia Posts: 211	Program and set it to deactivate below 55mph (stock it is set at 9mph). Works like a charm and still get good gas mileage on the highway