Exhaust pops on down rev.
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Joined: Jun 2005
Posts: 1,834
From: Indiana
Re: Exhaust pops on down rev.
Originally Posted by Birdman7389
I hate it, thankfully mine does not do it much. It sounds like a friggin backfire of sorts, and people look at you car like its a POS...
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Joined: Jun 2005
Posts: 1,834
From: Indiana
Re: Exhaust pops on down rev.
Originally Posted by 1camaro
My car did it too than a friend whos car did it said unplug smog pump it stoped his i unpluged mine no more pop.
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Joined: Apr 2005
Posts: 38
Re: Exhaust pops on down rev.
Originally Posted by Jazsun
Where do you unplug smog pump? Will it throw a code if I do this?(prolly)
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Joined: Sep 2003
Posts: 1,357
From: Charlotte, NC
Re: Exhaust pops on down rev.
Originally Posted by flatlander757
I think it sounds friggin sick 
My idea of why it pops is this:
When the car is up in the rpms, its dumping loads of fuel/air and exhausting that same amount... well when you suddenly decellerate, it isn't pushing as much exhaust out, so it creates a sort of vacuum... well something must fill that void, so either exhaust gases or ambient air fill it and the pops result from the vacuum being filled suddenly.
Like when you turn a soda bottle full of water upside down, it must go chug chug chug so the air can fill the space between each releasing of water. Notice that when you turn the bottle on it's side so that water flows out smoothly it doesn't chug like before... this would simulate keeping a steady, low, rpm.
or something
My idea of why it pops is this:
When the car is up in the rpms, its dumping loads of fuel/air and exhausting that same amount... well when you suddenly decellerate, it isn't pushing as much exhaust out, so it creates a sort of vacuum... well something must fill that void, so either exhaust gases or ambient air fill it and the pops result from the vacuum being filled suddenly.
Like when you turn a soda bottle full of water upside down, it must go chug chug chug so the air can fill the space between each releasing of water. Notice that when you turn the bottle on it's side so that water flows out smoothly it doesn't chug like before... this would simulate keeping a steady, low, rpm.
or something
Yea I always kinda figured it was something like that. Both of my cars have done it and I think it sounds pretty cool.
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