Will a handheld tuner fix exhaust backfire? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Razorbak · 08-05-2020, 09:33 PM

Recently picked up my 2013, it has a fairly loud backfire sometimes during shifting from 1-2 and 2-3. I like the decel popping, but would like to not have the loud backfires when shifting if they can be tuned out...I’m thinking it’s because of the CAI based on searching the topic,.will one of the handheld tuners like a SCT x4 fix this? Thanks, I couldn’t find this specific question when searching, if it’s already addressed I apologize!

Oh also it may have had cutouts installed at one point that were removed, I have switches for it but definitely no cutouts present now.

RobZL1 · 08-05-2020, 10:07 PM

You will need to disable or re-calibrate CFCO (Clutch Fuel Cut Off). Disabling will eliminate the pops while shifting, but you can also soften them by raising the timing advance when CFCO is active. You can also eliminate or soften the deceleration DFCO popping in a similar manner if so desired.

I don't know if SCT or one of the other handhelds allow you to do this, but in my limited experience, they don't.

HPTuners MPVI2 will fix you up, and give you much better logging capabilities, even if that's all you ever use it for, for the same price as the SCT x4 (once you factor in the 2 credits needed to license your ECM with HPT).

cray z1 · 08-06-2020, 09:58 AM

I have that same problem, thanks for the info, been bothering me for awhile now. Good thing I have HP Tuners

Razorbak · 08-06-2020, 04:58 PM

Quote:

Originally Posted by RobZL1

You will need to disable or re-calibrate CFCO (Clutch Fuel Cut Off). Disabling will eliminate the pops while shifting, but you can also soften them by raising the timing advance when CFCO is active. You can also eliminate or soften the deceleration DFCO popping in a similar manner if so desired.

I don't know if SCT or one of the other handhelds allow you to do this, but in my limited experience, they don't.

HPTuners MPVI2 will fix you up, and give you much better logging capabilities, even if that's all you ever use it for, for the same price as the SCT x4 (once you factor in the 2 credits needed to license your ECM with HPT).

Thanks, much appreciated!

cray z1 · 08-07-2020, 06:55 AM

Will turning off the CFCO also disable the No Lift Shift?

RobZL1 · 08-07-2020, 08:55 AM

I'm not sure. I doubt it, though.

08-05-2020, 09:33 PM	#1
Razorbak Drives: 2013 ZL1 Join Date: Jul 2020 Location: Omaha NE Posts: 17	Will a handheld tuner fix exhaust backfire? Recently picked up my 2013, it has a fairly loud backfire sometimes during shifting from 1-2 and 2-3. I like the decel popping, but would like to not have the loud backfires when shifting if they can be tuned out...I’m thinking it’s because of the CAI based on searching the topic,.will one of the handheld tuners like a SCT x4 fix this? Thanks, I couldn’t find this specific question when searching, if it’s already addressed I apologize! Oh also it may have had cutouts installed at one point that were removed, I have switches for it but definitely no cutouts present now.

08-05-2020, 10:07 PM	#2
RobZL1 fo'shizZL1 Drives: 2017 ZL1 Join Date: Aug 2017 Location: ATL Posts: 1,281	You will need to disable or re-calibrate CFCO (Clutch Fuel Cut Off). Disabling will eliminate the pops while shifting, but you can also soften them by raising the timing advance when CFCO is active. You can also eliminate or soften the deceleration DFCO popping in a similar manner if so desired. I don't know if SCT or one of the other handhelds allow you to do this, but in my limited experience, they don't. HPTuners MPVI2 will fix you up, and give you much better logging capabilities, even if that's all you ever use it for, for the same price as the SCT x4 (once you factor in the 2 credits needed to license your ECM with HPT). __________________ 2017 ZL1 M6 Black \| Maggie 2650 // 103TB // Big Gulp Past Rides- 2014 ZL1 M6 Red Hot \| Tons of mods 2004 CTS-V M6 Silver \| Many mods 1995 Corvette M6 Torch Red \| A few more mods 1992 Camaro M5 White \| A few mods

08-07-2020, 08:55 AM	#6
RobZL1 fo'shizZL1 Drives: 2017 ZL1 Join Date: Aug 2017 Location: ATL Posts: 1,281	I'm not sure. I doubt it, though. __________________ 2017 ZL1 M6 Black \| Maggie 2650 // 103TB // Big Gulp Past Rides- 2014 ZL1 M6 Red Hot \| Tons of mods 2004 CTS-V M6 Silver \| Many mods 1995 Corvette M6 Torch Red \| A few more mods 1992 Camaro M5 White \| A few mods

08-06-2020, 09:58 AM	#3
cray z1 Drives: 2014 Camaro ZL1 Red Hot Red Join Date: Oct 2016 Location: Winnipeg, Canada Posts: 73	I have that same problem, thanks for the info, been bothering me for awhile now. Good thing I have HP Tuners

08-07-2020, 06:55 AM	#5
cray z1 Drives: 2014 Camaro ZL1 Red Hot Red Join Date: Oct 2016 Location: Winnipeg, Canada Posts: 73	Will turning off the CFCO also disable the No Lift Shift?