Need help on deceleration pop - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

CamaroFreak626 · 06-15-2017, 08:01 AM

I have a 2010 2ss ls3 (manual) only mods are cai and kooks Lt headers and straight piped. My decel used to be loud and constant. Now it's just random I don't get it all the time like before if feel something is wrong,and when I get no decel pop and come to a complete stop my rpms stay revved high around 1500-2000 for about 4 seconds then it drops back to normal idle. Really weird. Thought it was a vacuum leak but was told if I had a vacuum leak rpms wouldn't drop to normal they'd stay up. Need help guys any ideas on what it might be?

Avenging Orange · 06-15-2017, 09:19 AM

Decel IS random.
Has it been tuned?

Olddudesrule · 06-15-2017, 09:42 AM

Not sure if the hesitant idle drop is related to the lack of normal decel pop, but it's certainly not normal. Gotta ask the same thing as Orange, did you get a tune after the mods, specifically if you deleted the rear cats and O2 sensors? My decel popping became a bit more pronounced after adding LTH/HFC's and a tune.

Gunmetal Speedster · 06-15-2017, 05:39 PM

I think I read on here that decel popping can actually be tuned out?

Either way, sounds like a job for your tuner to take a look at. If it isn't tuned, start there.

frankwjr · 06-15-2017, 05:47 PM

start at the front...clean air filter?.....strong maf?....good plugs?...plug wires?...any vacuum leaks?(check all hoses any way!)

and then is it tuned? with your mods would be a good idea...keep the exhaust valves from burning out(car is running lean..guaranteed)..

btw - put your mods in your sig...saves time!

CamaroFreak626 · 06-16-2017, 01:47 AM

Car has been tuned a day after mods and I might want to check my air filter which is probably the only thing I have not done. I've checked all hoses and plugs were just changed out.

avido · 06-16-2017, 03:34 AM

the tuner might have tuned the deceleration cut off off

Badfinger · 06-16-2017, 07:00 AM

In my experience decel popping usually means you need to add more fuel to you map just before the pop.

Russell James · 06-16-2017, 07:31 AM

Quote:

Originally Posted by CamaroFreak626

Car has been tuned a day after mods and I might want to check my air filter which is probably the only thing I have not done. I've checked all hoses and plugs were just changed out.

If it ran perfectly after being tuned, something has changed. An unstable idle is often on the intake side.

I'd take a close look at the the entire CAI and PCV. Is the air filter old...replace. Pull out the MAF, disconnect. Get a close look inside the MAF with a light, make sure the hot wire sensor is not all fuzzed up. Reinstall, reconnect MAF.

I'd take the CAI pipes off, reinstall - retighten. Just to make sure no leaks on the intake side. When off, you can also peek at the throttle blade, throttle body and make sure it is not uber carbon'd up. A lot of carbon around the throttle blade can cause an unstable idle.

A good clue on the PCV side is.... get the engine fully warmed up and idling. Pop the oil cap off quick. There should be a brief little stumble/change and then resettling of the idle. If you can pop the oil cap off without any noticeable little change in the idle... the PCV system is not sealed.

An over-oiled air cleaner can cause these probs. Mucks up the MAF.

I'd start with all those CAI, MAF, and PCV checks. Keep in mind tuning doesn't change.... If it ran perfectly after initially tuned.... and now doesn't, something has gone wrong.

Decel fueling, popping or no popping can be adjusted in the tune. After LTs and CAI, mine was tuned for no popping and it never has. Just a slight burble on decel. Not a single backfire since I loaded a tune from Ted at JRE. Which is exactly what I wanted. To me... backfiring sounds like a clunker that the muffler fell off.

WoodBoss · 06-16-2017, 07:31 AM

What tuner do you have?

Black_SS10 · 06-16-2017, 08:33 AM

From what I gathered the decel pop is actually from the fuel being cutoff. It can be tuned out. Having it or not wont hurt anything. Ask a tuner.

CamaroFreak626 · 06-16-2017, 06:05 PM

Quote:

Originally Posted by WoodBoss

What tuner do you have?

I got it tuned at izzy's performance. Real cool guy that knows his stuff

CamaroFreak626 · 06-16-2017, 06:07 PM

Yea even after the tune I had alot of decel pop, which I love honestly, but maybe after a year now that it's been tuned I started noticing that it doesn't pop as much as before and my rpms stay stuck high sometimes, but thanks alot guys you guys really are a big help and I appreciate it all the tips you guys have for me. I will check into my intake it's the only thing I have not checked I'm sure the filter might need replacing since I havent cleaned it since I installed it which has been a pretty long time. I had checked the throttle body already and cleaned it all up as well as the maf sensor.

cc-rider · 06-16-2017, 07:02 PM

Decel pop is all related to what is called "deceleration fuel cut off" or "DFCO". When the car is on deceleration, the fuel gets cut off and then you get the popping. You can tune for more pop...or no pop at all.

The other thing that can affect how much pop you get, even if you are trying for it, is exhaust leaks. Sometimes headers leak where they connect to cats or o/r pipe and this can decrease the pop.

06-15-2017, 08:01 AM	#1
CamaroFreak626 Drives: 2010 camaro ss LS3 Join Date: Dec 2014 Location: la Puente, CA Posts: 39 View My Garage	Need help on deceleration pop I have a 2010 2ss ls3 (manual) only mods are cai and kooks Lt headers and straight piped. My decel used to be loud and constant. Now it's just random I don't get it all the time like before if feel something is wrong,and when I get no decel pop and come to a complete stop my rpms stay revved high around 1500-2000 for about 4 seconds then it drops back to normal idle. Really weird. Thought it was a vacuum leak but was told if I had a vacuum leak rpms wouldn't drop to normal they'd stay up. Need help guys any ideas on what it might be?

06-15-2017, 09:19 AM	#2
Avenging Orange Drives: 2010 Inferno Orange 2SS/RS Join Date: Apr 2010 Location: Clermont, IN Posts: 3,297	Decel IS random. Has it been tuned? __________________ 2010 Inferno Orange 2SS/RS M6 Black Leather, Sun Roof, OBX Headers, Borla touring axle back, Cold Air Inductions CAI , non synthetic fluids, BMR total bushing upgrade/1" lowering springs, DSE 32mm rear sway bar. GM fe4 shocks/struts/LCA's, AAM 3.91 diff, Vertini RFS1.8 20x9 +30. Conti ExtremeContact Sport 275/35/20. sjm autoprod ABL dash kit. Mike Norris tuned 413/419. Avenging Orange: 43 years of not buying into the Hype........and damn proud of it!! https://youtu.be/9JD9it6SmB8 https://youtu.be/xmelTlEzI34 KICKING CANCERS ASS SINCE 2015!!

06-15-2017, 09:42 AM	#3
Olddudesrule Resident nomad Drives: 2014 Summit White 1SS/1LE Join Date: Nov 2015 Location: Gilbert, AZ Posts: 1,766	Not sure if the hesitant idle drop is related to the lack of normal decel pop, but it's certainly not normal. Gotta ask the same thing as Orange, did you get a tune after the mods, specifically if you deleted the rear cats and O2 sensors? My decel popping became a bit more pronounced after adding LTH/HFC's and a tune. __________________ Sold: 2007 Z06 2002 Viper GTS/ACR 2003 Z06 1965 FFR Cobra 2012 Nissan 370Z ADM LSA Stage II, Roto-Fab CAI, Kooks LTH/HFC's, Phastek CC, ported TB, Mishimoto radiator and oil cooler, BC Racing ER Series CO's, JPSS 32mm Black Magic rear bar, JPSS front inserts, R1 Concepts Premier slotted rotors/Goodrich SS lines, Schroth ASM harness, MGW flatstick, Brey-Krause HB, Tuned by NicD, at Cordes Performance Racing.

06-15-2017, 05:39 PM	#4
Gunmetal Speedster Drives: Savitar; The 500rwhp N/A Monster! Join Date: Aug 2016 Location: Middletown, Ohio Posts: 2,914 View My Garage	I think I read on here that decel popping can actually be tuned out? Either way, sounds like a job for your tuner to take a look at. If it isn't tuned, start there. __________________ **SOLD504HP/433**TQ \| Night Fury cammed • Cold Air Inductions intake • Bo White ported TB • Speed Engineering 1 7/8 longtubes • NPP catback • QTP low profile cutouts • Powerbond 25% UDP • 3.73 gears • JRE scoop • ZL1 grille • R1 Concepts drilled/slotted rotors • built/tuned by Weapon X Motorsports Instagram \| YouTube \| Build Thread

06-15-2017, 05:47 PM	#5
frankwjr Drives: 2010 SS 2SS M6 Join Date: Aug 2016 Location: Smithsburg, Md. Posts: 2,446	start at the front...clean air filter?.....strong maf?....good plugs?...plug wires?...any vacuum leaks?(check all hoses any way!) and then is it tuned? with your mods would be a good idea...keep the exhaust valves from burning out(car is running lean..guaranteed).. btw - put your mods in your sig...saves time! __________________ 2010 SS 2SS M6 - Tune by RDP dynoSteve!(Woot) - Daily Driver - *150K!* - All work by me...

06-16-2017, 01:47 AM	#6
CamaroFreak626 Drives: 2010 camaro ss LS3 Join Date: Dec 2014 Location: la Puente, CA Posts: 39 View My Garage	Car has been tuned a day after mods and I might want to check my air filter which is probably the only thing I have not done. I've checked all hoses and plugs were just changed out.

06-16-2017, 03:34 AM	#7
avido Drives: camaro ss\rs Join Date: Jun 2014 Location: Italia Posts: 755	the tuner might have tuned the deceleration cut off off __________________ 2014 camaro SS Whipple powered ,3.750 pulley,ID850, CAI,Flowmaster American Thunder exhaust,MGW racing shifter,Bo White ported tb,MightyMouse Catch Can,Vitesse throttle controller,GM 3.91 rear end, Dynatech longtube haders, BTR Pd cam,Fluidampr stock pulley,ZL1 fuel pump and ADM fpcm, Phastek scoop and fluid thank relocation Bmr Motor mount . Tuned by Mastuning

06-16-2017, 07:00 AM	#8
Badfinger Drives: 2010 2SS Join Date: Mar 2010 Location: Dayton, Ohio Posts: 387 View My Garage	In my experience decel popping usually means you need to add more fuel to you map just before the pop.

06-16-2017, 07:31 AM	#10
WoodBoss "Old School" Drives: 2010 2SS L99 Join Date: Apr 2015 Location: Sherrills Ford, NC Posts: 1,295	What tuner do you have?

06-16-2017, 08:33 AM	#11
Black_SS10 SomeguyK Drives: 2010 Black 2SS/RS Join Date: Nov 2014 Location: FL Posts: 1,947	From what I gathered the decel pop is actually from the fuel being cutoff. It can be tuned out. Having it or not wont hurt anything. Ask a tuner. __________________ TMS 427, Dart iron Block, Forged assembly, Frankenstien heads, AGP TT 62/62 BB turbo's, AGP/Fore triple fuel system, Tilton clutch, Holley 1 7/8 shorties, Technostalgia tail lights,Oracle, Aeroforce, MGW shifter,Flowmaster, Pegasus subframe bushings,BMR trailing & toe arms,Z28 UCA bushings,Zl1 rear sway bar,Prothane,BMR,Goodridge brake lines,Ridetech HQ coilovers,3.91,Trutrac,billet caps,DSS axles,HE offest,built TR6060,1LE diffuser,Havoc spoiler,SSclones,20in MRR 017, Pirelli P Zero, Nitto NT555RII More to come.

06-16-2017, 06:07 PM	#13
CamaroFreak626 Drives: 2010 camaro ss LS3 Join Date: Dec 2014 Location: la Puente, CA Posts: 39 View My Garage	Yea even after the tune I had alot of decel pop, which I love honestly, but maybe after a year now that it's been tuned I started noticing that it doesn't pop as much as before and my rpms stay stuck high sometimes, but thanks alot guys you guys really are a big help and I appreciate it all the tips you guys have for me. I will check into my intake it's the only thing I have not checked I'm sure the filter might need replacing since I havent cleaned it since I installed it which has been a pretty long time. I had checked the throttle body already and cleaned it all up as well as the maf sensor. __________________ Volant Cai, kooks long tube headers, straight piped exhaust, dyno tune.

06-16-2017, 07:02 PM	#14
cc-rider Drives: 2010 Camaro SS Join Date: Dec 2006 Location: MN Posts: 1,171	Decel pop is all related to what is called "deceleration fuel cut off" or "DFCO". When the car is on deceleration, the fuel gets cut off and then you get the popping. You can tune for more pop...or no pop at all. The other thing that can affect how much pop you get, even if you are trying for it, is exhaust leaks. Sometimes headers leak where they connect to cats or o/r pipe and this can decrease the pop.