2010 camaro whipple and backfires - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

VASTREETRACER · 03-19-2015, 09:08 PM

Still having the same issues I've been fighting for a while. My car is a 2010 SS. Mods include, LS9 cam, 2.9 whipple, 3.875 pulley (whipples 10# pulley boost gauge says 12#) tsp headers, magnaflow catback, cat delete, rear O2 Deleted, cai cold air, zl1 fuel pump , adm fpcm , msd boost a pump and custom tune. Issues are intermittent pop and backfires when I go WOT. Sometimes it's like a violent fuel shut off. Pulled the plugs and replaced them (gaps at 32) today all but 7&8 looked good, both 7-8 had speckling and 8 had a slight bit of oil on the theads. On the dyno the car runs great and makes good numbers but on the street if I hold it in first gear and then punch it sometimes it runs great others it does the pop backfire fuel shut off stuff and for the life of me and my tuner we can't figure out whats going on. Any suggestions??? Thanks in advance

BlaqWhole · 03-21-2015, 01:37 AM

Stock bottom end I assume? You may have hurt something. Do a compression check in each cylinder and compare them. At 10-12 psi of boost on stock internals, I'd venture to say you damaged something.

VASTREETRACER · 03-21-2015, 04:59 AM

Thanks. I'll do that tonight when I get in from work.

Rumbumbees$ponsor · 03-21-2015, 01:52 PM

verify fuel pressure aswell

VASTREETRACER · 03-21-2015, 05:04 PM

70~ psi at the rail at wot. It dumps a ton of black smoke when it does it, runs rough for a second then clears up. I change oil every 5k with Mobil 1 and it may use 1/4 of a qt

Supermaro54 · 03-21-2015, 07:56 PM

Quote:

Originally Posted by VASTREETRACER

70~ psi at the rail at wot. It dumps a ton of black smoke when it does it, runs rough for a second then clears up. I change oil every 5k with Mobil 1 and it may use 1/4 of a qt

Sounds very familiar to the symptoms I had. Frustrating, previous tuner couldn't figure it out.

What does your tuner say?

VASTREETRACER · 03-22-2015, 05:51 AM

Looking at the power enrichment tables. I know nothing about tuning so I won't even pretend I do lol. He was saying for some reason my map setting was at 110 and needs to be below 50. Going to try that as soon as I can get it back to him. But honestly I think he is scratching his head like I am mainly because it's so intermittent, he's good and done a lot of camaros this one just seems to have us both confused. If we can't figure it out the car may end up on a road trip to see if Ted at Jennetty can figure it out.

TRC-SS · 10-24-2015, 12:01 PM

did you ever figure out what was wrong?

VASTREETRACER · 10-24-2015, 05:36 PM

Yeah my belt was slipping at wide open throttle. Tightened it up and it fixed the issue. Now I am just going through a belt about once every 1-2 weeks due to my belt stretching

ToddB · 10-24-2015, 06:55 PM

Quote:

Originally Posted by VASTREETRACER

Yeah my belt was slipping at wide open throttle. Tightened it up and it fixed the issue. Now I am just going through a belt about once every 1-2 weeks due to my belt stretching

I am running a 8 rib setup with 13 psi of boost with everything the same as you excepts gears. I am not getting any belt slip and its working great. I also was going threw belts until I went to the 8 rib. I did not think I was over 700 RWHP but I guess I must be. Also I am running a innovators west 8 rib 10% overdrive damper with a 3.75 pulley getting 13 psi.

TRC-SS · 10-25-2015, 11:33 AM

Mines doing it at high RPM under Wide Open

SLP Supercharger
3.0 Pulley with JRE Super Tensioner (13lbs) with 8 rib
6 Rib v- Belt
Headers, no cats

Stock Cam

Made 606 at wheels.

I was driving in second gear, smashed the pedal and immediately started backfiring (8times or so) lost power, car was sputtering, no check engine lights, after 10 seconds it was clear and good to go.

Did it again 20 min later merging onto highway, easy through first, into second. Hard onto second gear, shifted to 3rd wide open...bam happened again. Total 5 times in 3 drives.

All traction control and stable track were off.

Car when in for new fuel pump 2 weeks ago. went from 3.4pulley to a 3.0 and added a torch 97 octane tune. Car ran fine before dropping pulley and tune.

TRC-SS · 10-26-2015, 10:22 AM

I believe I fixed my issue. I had changed the MAF out the week prior to dropping pulley. Car was fine on dyno, but on street had issues.

By some advise from Ted at JRE, switched the old MAF back in and the issue seems to be gone.

JANNETTYRACING · 10-26-2015, 12:17 PM

Quote:

Originally Posted by VASTREETRACER

Still having the same issues I've been fighting for a while. My car is a 2010 SS. Mods include, LS9 cam, 2.9 whipple, 3.875 pulley (whipples 10# pulley boost gauge says 12#) tsp headers, magnaflow catback, cat delete, rear O2 Deleted, cai cold air, zl1 fuel pump , adm fpcm , msd boost a pump and custom tune. Issues are intermittent pop and backfires when I go WOT. Sometimes it's like a violent fuel shut off. Pulled the plugs and replaced them (gaps at 32) today all but 7&8 looked good, both 7-8 had speckling and 8 had a slight bit of oil on the theads. On the dyno the car runs great and makes good numbers but on the street if I hold it in first gear and then punch it sometimes it runs great others it does the pop backfire fuel shut off stuff and for the life of me and my tuner we can't figure out whats going on. Any suggestions??? Thanks in advance

Try a New MAF sensor, seen this before same scenario.

VASTREETRACER · 10-26-2015, 05:18 PM

Thanks Ted

03-19-2015, 09:08 PM	#1
VASTREETRACER Drives: 2023 Camaro SS 1LE on order Join Date: Dec 2014 Location: Bowling green Va Posts: 293	2010 camaro whipple and backfires Still having the same issues I've been fighting for a while. My car is a 2010 SS. Mods include, LS9 cam, 2.9 whipple, 3.875 pulley (whipples 10# pulley boost gauge says 12#) tsp headers, magnaflow catback, cat delete, rear O2 Deleted, cai cold air, zl1 fuel pump , adm fpcm , msd boost a pump and custom tune. Issues are intermittent pop and backfires when I go WOT. Sometimes it's like a violent fuel shut off. Pulled the plugs and replaced them (gaps at 32) today all but 7&8 looked good, both 7-8 had speckling and 8 had a slight bit of oil on the theads. On the dyno the car runs great and makes good numbers but on the street if I hold it in first gear and then punch it sometimes it runs great others it does the pop backfire fuel shut off stuff and for the life of me and my tuner we can't figure out whats going on. Any suggestions??? Thanks in advance __________________ 2017 Camaro SS 50th anniversary, I sold it but 2010 Camaro SS, whipple, cam, full bolt ons and full exhaust made 739/656 RWHP/TQ on 93 pump gas

03-21-2015, 04:59 AM	#3
VASTREETRACER Drives: 2023 Camaro SS 1LE on order Join Date: Dec 2014 Location: Bowling green Va Posts: 293	Thanks. I'll do that tonight when I get in from work. __________________ 2017 Camaro SS 50th anniversary, I sold it but 2010 Camaro SS, whipple, cam, full bolt ons and full exhaust made 739/656 RWHP/TQ on 93 pump gas

03-21-2015, 01:52 PM	#4
Rumbumbees$ponsor Drives: Autobot Join Date: Jan 2015 Location: H-Town Posts: 230	verify fuel pressure aswell __________________

03-21-2015, 05:04 PM	#5
VASTREETRACER Drives: 2023 Camaro SS 1LE on order Join Date: Dec 2014 Location: Bowling green Va Posts: 293	70~ psi at the rail at wot. It dumps a ton of black smoke when it does it, runs rough for a second then clears up. I change oil every 5k with Mobil 1 and it may use 1/4 of a qt __________________ 2017 Camaro SS 50th anniversary, I sold it but 2010 Camaro SS, whipple, cam, full bolt ons and full exhaust made 739/656 RWHP/TQ on 93 pump gas

03-22-2015, 05:51 AM	#7
VASTREETRACER Drives: 2023 Camaro SS 1LE on order Join Date: Dec 2014 Location: Bowling green Va Posts: 293	Looking at the power enrichment tables. I know nothing about tuning so I won't even pretend I do lol. He was saying for some reason my map setting was at 110 and needs to be below 50. Going to try that as soon as I can get it back to him. But honestly I think he is scratching his head like I am mainly because it's so intermittent, he's good and done a lot of camaros this one just seems to have us both confused. If we can't figure it out the car may end up on a road trip to see if Ted at Jennetty can figure it out. __________________ 2017 Camaro SS 50th anniversary, I sold it but 2010 Camaro SS, whipple, cam, full bolt ons and full exhaust made 739/656 RWHP/TQ on 93 pump gas Last edited by VASTREETRACER; 03-22-2015 at 06:02 AM.

03-21-2015, 01:37 AM	#2
BlaqWhole Account Suspended Drives: 2017 Camaro ZL1 A10 Join Date: May 2012 Location: NJ Posts: 7,692	Stock bottom end I assume? You may have hurt something. Do a compression check in each cylinder and compare them. At 10-12 psi of boost on stock internals, I'd venture to say you damaged something.

10-24-2015, 12:01 PM	#8
TRC-SS 700RWHP-650TQ Drives: 2011 Forged LS3 Supercharged/Cammed Join Date: Aug 2010 Location: Shrewsbury Massachusetts Posts: 5,269 View My Garage	did you ever figure out what was wrong? __________________ View Build HERE>>>>>MY 2011 2SS/RS JOURNAL

10-24-2015, 05:36 PM	#9
VASTREETRACER Drives: 2023 Camaro SS 1LE on order Join Date: Dec 2014 Location: Bowling green Va Posts: 293	Yeah my belt was slipping at wide open throttle. Tightened it up and it fixed the issue. Now I am just going through a belt about once every 1-2 weeks due to my belt stretching __________________ 2017 Camaro SS 50th anniversary, I sold it but 2010 Camaro SS, whipple, cam, full bolt ons and full exhaust made 739/656 RWHP/TQ on 93 pump gas

10-25-2015, 11:33 AM	#11
TRC-SS 700RWHP-650TQ Drives: 2011 Forged LS3 Supercharged/Cammed Join Date: Aug 2010 Location: Shrewsbury Massachusetts Posts: 5,269 View My Garage	Mines doing it at high RPM under Wide Open SLP Supercharger 3.0 Pulley with JRE Super Tensioner (13lbs) with 8 rib 6 Rib v- Belt Headers, no cats Stock Cam Made 606 at wheels. I was driving in second gear, smashed the pedal and immediately started backfiring (8times or so) lost power, car was sputtering, no check engine lights, after 10 seconds it was clear and good to go. Did it again 20 min later merging onto highway, easy through first, into second. Hard onto second gear, shifted to 3rd wide open...bam happened again. Total 5 times in 3 drives. All traction control and stable track were off. Car when in for new fuel pump 2 weeks ago. went from 3.4pulley to a 3.0 and added a torch 97 octane tune. Car ran fine before dropping pulley and tune. __________________ View Build HERE>>>>>MY 2011 2SS/RS JOURNAL

10-26-2015, 10:22 AM	#12
TRC-SS 700RWHP-650TQ Drives: 2011 Forged LS3 Supercharged/Cammed Join Date: Aug 2010 Location: Shrewsbury Massachusetts Posts: 5,269 View My Garage	I believe I fixed my issue. I had changed the MAF out the week prior to dropping pulley. Car was fine on dyno, but on street had issues. By some advise from Ted at JRE, switched the old MAF back in and the issue seems to be gone. __________________ View Build HERE>>>>>MY 2011 2SS/RS JOURNAL

10-26-2015, 05:18 PM	#14
VASTREETRACER Drives: 2023 Camaro SS 1LE on order Join Date: Dec 2014 Location: Bowling green Va Posts: 293	Thanks Ted __________________ 2017 Camaro SS 50th anniversary, I sold it but 2010 Camaro SS, whipple, cam, full bolt ons and full exhaust made 739/656 RWHP/TQ on 93 pump gas