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I get a quick "pop" backfire when i shift gears sometimes...

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Old 08-06-2008, 11:34 AM
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Default I get a quick "pop" backfire when i shift gears sometimes...

My car is street tuned and running abit rich, I'm trying to solve this quick pop sound I get when I shift like a granny. If I shift fast most of the time it'll stop it, but when I casually shift I get this annoying "pop".
I run 94 gas everytime, 3" turbo back exhaust running 1 bar of boost... I've had this for a year now, 40,xxx km on it, stills runs mint...
should I get this retuned or something? Is there any way for me to get rid of it?
Old 08-06-2008, 12:03 PM
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Default Re: I get a quick "pop" backfire when i shift gears sometimes... (Maxcapacity)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Maxcapacity &raquo;</TD></TR><TR><TD CLASS="quote">My car is street tuned and running abit rich </TD></TR></TABLE>

You answered your own question really.

Is it excessively rich? Do you know what the a/f ratio is? Since you mention it is 'street tuned', I would go get it dyno tuned. What are you using for engine management?

Heck, I had an N/A Integra that used to toss small fireballs as well as pop. And I loved it! haha
Old 08-06-2008, 02:58 PM
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My car was the reverse. Evans tuned fire balled and popped when racing through the gears.
Old 08-06-2008, 03:10 PM
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rich
Old 08-06-2008, 03:11 PM
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if its running good i would leave it... i get a little pop sometimes too. i like it. hehe
Old 08-08-2008, 07:38 AM
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mine pops too when im getting into it and shifting like im trying to rip the trans through the floorboard lol. Friends turbo E30 bimmer does it too
Old 08-08-2008, 08:25 AM
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Default Re: (Speed94)

I feel left out, mine does not pop or make fire...
Old 08-08-2008, 09:06 AM
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Default Re: (twkdCD595)

shes running a little too rich at throttle cut. When the map suddenly hits vacuum, you are sending too much unburned fuel through the exhaust.
Old 08-08-2008, 09:23 AM
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Thats just the anti-lag
Old 08-08-2008, 02:14 PM
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Default Re: (Voodooboy520)

It's pretty normal, nothing to really be concerned about. Lean up your partial throttle if you want it to go away.
Old 08-08-2008, 02:46 PM
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Default Re: I get a quick "pop" backfire when i shift gears sometimes... (Maxcapacity)

pretty normal imo. I see it all the time on cars running large exhausts or open dowpipe.
Old 11-08-2008, 02:30 PM
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Default Re: I get a quick "pop" backfire when i shift gears sometimes... (SOHC_MShue)

I also get pops once in awhile between shifts on my mostly stock NA B16, I like it.
Old 11-08-2008, 03:12 PM
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Default Re: I get a quick "pop" backfire when i shift gears sometimes... (civicjoe)

When its any richer than ~14.7, that means there is RAW gasoline in the exhaust - the pop is the gasoline getting to some oxygen & re-igniting. Many cars do this because its better than a lean condition when you let up. However, with the right tuning (tip-out corrections & proper partial-throttle tune), it will not become overly rich when you let off. None of the cars I'.ve dealt with popped, except my beater EF (2 minute tune & muffler fell off)

Race cars will do this mainly because they have free-flowing exhaust that sucks the exhaust out so well, and because they won't run such advanced timing for high-rpm/low load. This means partial combustion, resulting in inefficient burn, and - fireballs.
Old 11-08-2008, 07:45 PM
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Default Re: I get a quick "pop" backfire when i shift gears sometimes... (Maxcapacity)

Get a cat?
Old 11-08-2008, 08:54 PM
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Default Re: I get a quick "pop" backfire when i shift gears sometimes... (Marcpb443)

Originally Posted by Marcpb443
Get a cat?
Like meow?
Old 11-09-2008, 07:27 AM
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Default Re: I get a quick "pop" backfire when i shift gears sometimes... (never_finish)

Originally Posted by never_finish

Like meow?
I'm allergic, that wouldn't work for me, lol!
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