Hey guys, just wondering why you think my car makes poping noises out the exhaust under deceleration? I have a magnaflow resonator and muffler, CIA Header and downpipe. Its all tight i hear no leaks.

 

dont know, but they all do it, probably something with unburnt fuel burning

 

my magnaflow exhaust was popping like that and a couple of welds inside the resonator went bad and i had to replace it but then the replacement did the same thing so I'm not sure of a solution for the issue yet

 

head this on most vehicles that have aftermarket exhaust, even my atv does this

 

trust me cobalts are big for the crackling and popping when either down shifting and while shifting, mine does it and its loud, most of the time its low so it does'nt sound bad, ive been told its from running to rich or like said above unburnt fuel burning out.

 

did u try decelerating with the clutch in? if it doesnt do it with the clutch in then its nothing to be worried about.

 

lol @ this thread. its completly normal...

 

all cars will do it... its ur car trying to wind it self down.. have u ever heard a v8 wind down... it crackels and pops( just in a less ricey way lol) it boggs down... well instead of bogging we have a 4 banger so it snap crackels and pops... like the cerial . but its normal and the only way to help it sound quieter is get a bigger resonator and a more restrictive muffufler( which is just like keppin the stock system lol.)

 

hell even my 2.2 does it. lol

 

Its normal. With my cutout open it pops a few times then backfires REALLY loud then pops some more. They pop stock but its more audible with an exhaust

 

i heard its caused from no back pressure. and i also have heard its from unburnt fuel igniting in the hot pipes and such. what it realy is i dont know

 

its all backpressure.......

 

lol..

 

*sigh*

 

i get it too and i run a bit too rich so its most likely fuel igniting in the exhaust

 

DFCO. Turn this off with HPT and it'll pop all day long. It's 100% normal

 

Sounds great when it does that. I try to make that happen as much as I can.