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Backfire on shift

Old Apr 11, 2013 | 12:09 AM
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Default Backfire on shift

If I get on the Miata real, real hard, I've noticed I can trigger backfire if I shift fast after I switched to a MS3.

Is this something I need to worry about/potentially damaging, or can I leave it as is?
Old Apr 11, 2013 | 12:21 AM
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doesnt a backfire mean unburned fuel?
Old Apr 11, 2013 | 12:21 AM
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Yep.
Old Apr 11, 2013 | 12:43 AM
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The only thing I can think of is the cat being damaged, but I think youre fine.
Old Apr 11, 2013 | 12:48 AM
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...I got no cat dude.

This is something specific to the MS3, and a change that happened in my switch from my old MS2 to the new MS3. If it doesn't hurt anything, IDGAF though.
Old Apr 11, 2013 | 01:16 AM
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You can either tweak decel fuel and the high RPM/low load fueling cells to fix it, or DGAF/YOLO/etc.
Old Apr 11, 2013 | 03:07 AM
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I came up with one:

FIRI- **** It, Run It.
Old Apr 11, 2013 | 03:58 AM
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Do you maybe have a launch control setup on? Mine will pop if i don't clutch>release gas fast enough on some rare occasions. But it makes me sound cool when i'm yoloing so i keep it.

I don't think my turbo likes it though.
Old Apr 11, 2013 | 08:23 AM
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My ms2 did that, its not ms3 specific. Basically what sav said
Old Apr 11, 2013 | 08:33 AM
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I came up with one:

tune the car.
Old Apr 11, 2013 | 08:35 AM
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NO WAY!!! Sounds like bs
Old Apr 11, 2013 | 08:47 AM
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Wait is it a back fire or popping from the exhaust. A backfire is baaaaaaddddd on a turbo car, that **** will eat the compressor wheel. Popping from the exhaust is no biggy, it means there's hot unburnt fuel in the exhaust and that you're introducing enough clean air for it to light off, probably from decel cut or from a pinhole in the downpipe area.
Old Apr 11, 2013 | 08:51 AM
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Originally Posted by Leafy
Wait is it a back fire or popping from the exhaust. A backfire is baaaaaaddddd on a turbo car, that **** will eat the compressor wheel. Popping from the exhaust is no biggy, it means there's hot unburnt fuel in the exhaust and that you're introducing enough clean air for it to light off, probably from decel cut or from a pinhole in the downpipe area.
Us normal people on this almost normal forum, refer to backfire as the latter of your description, and nothing having to do with the intake side of the engine. At all.
Old Apr 11, 2013 | 08:55 AM
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when's the last time you heard someone describe an afterfire as such? Never.
Old Apr 11, 2013 | 10:11 AM
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I will vote for "exhaust leak in the downpipe region" give or take. backfires like a bauuuuuus
Old Apr 11, 2013 | 10:31 AM
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I vote for overrun not turned on from lack of tuning.
Old Apr 11, 2013 | 10:32 AM
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Only solution is a v8 swap
Old Apr 11, 2013 | 10:38 AM
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Originally Posted by Braineack
I vote for overrun not turned on from lack of tuning.
+1

My cars and the cars I've tuned almost never shoot fire on decel, even when downshifting. This differs from every turbo, AWD car I've ever seen.
Old Apr 11, 2013 | 10:39 AM
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Originally Posted by hustler
+1

My cars and the cars I've tuned almost never shoot fire on decel, even when downshifting. This differs from every turbo, AWD car I've ever seen.
All of which are obviously not tuned all the way either, or actually tuned to do that on purpose. None of my many turbo awd cars ever backfired **unless** I was in a ricey mood and intentionally made them do it
Old Apr 11, 2013 | 11:37 AM
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I love you guys, so much right now. Wake up, come back to this thread, get useful information AND laugh my *** off.
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