Backfired twice today need help. - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

MBS · 03-31-2015, 08:42 PM

I have a 2010 LLT , Mods are K&N Cai , BBK Longtubes with High flow cats BBK - X Pipe and 2@side Chambered Mufflers , Had them on for 2 months now and everything was fine , The CEL was on the whole time , But no problems , Now today this morning and after work it has backfired on cold starts only, Is it time to have it tuned now? What is causing this too much gas /running too rich ?

Ventmaster · 04-02-2015, 04:49 PM

It would be helpful to check and see what CEL's have been tripped. There may be something more than the expected O2 sensor codes triggered by your headers.

My first thing to check would be the header manifold bolts. They often need retightened after a few miles/heat cycles. A small leak here could result in your backfires.

spadz93 · 04-02-2015, 05:05 PM

you should probably get tuned... getting rid of two of the o2 sensors does kinda throw the car off. the car will learn, but only to a point

MBS · 04-02-2015, 07:49 PM

Quote:

Originally Posted by Ventmaster

It would be helpful to check and see what CEL's have been tripped. There may be something more than the expected O2 sensor codes triggered by your headers.

My first thing to check would be the header manifold bolts. They often need retightened after a few miles/heat cycles. A small leak here could result in your backfires.

Quote:

Originally Posted by spadz93

you should probably get tuned... getting rid of two of the o2 sensors does kinda throw the car off. the car will learn, but only to a point

I went in a talked to a reputable tune shop here and he actually said that it is normal and with the exhaust I got it is nothing to worry about , It flows so clean that now you can hear it better than when I had the stock exhaust , It had something to do with extra gas in the intake and when it sparks when ignited that can happen , at least that what I think he was referring too, I don't know I am a dumbass when it gets that technical

Anyways I will be getting the tune next week and all should be good , Thanks for the replies I appreciate it .

Ventmaster · 04-03-2015, 02:44 PM

Quote:

Originally Posted by CreativeDawn

I noticed that my car has a lot more exhaust pops and backfires when I have somewhat of a full tank which I normally never do because somebody told me that the octane levels slowly decrease everyday by a small small margin.

Are you sure you don't just have a heavier foot when you know you got plenty of gas?!

03-31-2015, 08:42 PM	#1
MBS Drives: 2010 rs 2lt Join Date: Aug 2012 Location: wisconsin Posts: 2,497	Backfired twice today need help. I have a 2010 LLT , Mods are K&N Cai , BBK Longtubes with High flow cats BBK - X Pipe and 2@side Chambered Mufflers , Had them on for 2 months now and everything was fine , The CEL was on the whole time , But no problems , Now today this morning and after work it has backfired on cold starts only, Is it time to have it tuned now? What is causing this too much gas /running too rich ?

04-02-2015, 05:05 PM	#3
spadz93 BUMBL Z Drives: 2015 ZL1 Join Date: Nov 2013 Location: Northern NJ Posts: 2,573 View My Garage	you should probably get tuned... getting rid of two of the o2 sensors does kinda throw the car off. the car will learn, but only to a point __________________ Current: 2015 ZL1 M6, Rotofab Intake, LS3 throttle body, 2.55 Upper/9.17 Lower w/ Idler Relocation, DMS Reinforced Brick, ID1050X, 1 7/8" Headers, ProSpeed HX/Reservoir, DSX Aux Pump/Flex Fuel Sensor, E85, McLeod RXT, BMR 1" Drop, Tuned by Pat G Past: 2010 2SS, some bolt ons, 415rwhp/400rwtq

04-02-2015, 04:49 PM	#2
Ventmaster Drives: 2017 1SS 6spd Join Date: Jan 2011 Location: Utah Posts: 2,882	It would be helpful to check and see what CEL's have been tripped. There may be something more than the expected O2 sensor codes triggered by your headers. My first thing to check would be the header manifold bolts. They often need retightened after a few miles/heat cycles. A small leak here could result in your backfires.