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00' Honda Civic EX
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1,557 Posts
Discussion Starter · #1 ·
so is poppin flames out of the exhaust a sign of something bad lol? I've always thought it looked awesome and I kinda wished my car would do it and tonight me and my buddy were playing around on the interstate and he said when I passed him, it popped a couple flames out. I've been told that once before too. I just wanted to make sure that's ok. I've heard of lean popping before but Im pretty sure Im not lean lol. The leanest I get is MAYBE 12.3 and that's because Im not fully dyno tuned yet. So yea, what causes that and is it ok or bad?
 

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07' Odyssey 07'Magnum
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10,290 Posts
usally its from unbuned fuel in the exhaust, shouldnt worry to much, all though ive heard of peoples mufflers blowing up from it...haa
 

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i thought it was unburned fuel in the exhaust. condition of running rich, but im not sure

hah, 40 sec post intervals own!.
 
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00' Honda Civic EX
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1,557 Posts
Discussion Starter · #6 ·
would it be from me running rich or would it be from when you let off the gas it goes to like 18.0 a/f for just a sec during decel?
 

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07' Odyssey 07'Magnum
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does it blow black smoke when under acceleration
 

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Discussion Starter · #8 ·
It did the other night. I was holding it at like 4500 and then punched it and a big black cloud shot out...I guess it's just running rich. Im glad though...better than running lean!
 

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07' Odyssey 07'Magnum
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10,290 Posts
yep. its runnin rich allright, wach out tho, it could foul out your plugs and gas milage will go away also...
 

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00' Honda Civic EX
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Discussion Starter · #10 ·
yea Im gonna pull my plugs tomorrow.It's got a miss every so often but I think it's from my BOV pushing on my #1 cylinder plug wires and fucking up the connection for just a sec
 

· yellow bar for me
viper blue 92 eg
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4,223 Posts
ya it sounds like its a little rich to me. thats the way my d15b7 is not it pops everytime i shift gears, but im not really sure why its running rich.
 

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I have never seen a muffler explode...that would be sweet lol
 

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I have never seen a muffler explode...that would be sweet lol
Ever hear why magnaflow wouldnt warenty there mufflers if installed on a RX7? cause they would blow holes in them, my buddy did after a run to 120mph all i heard was BAM! and the car was sooooooooooooo loud
 

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00' Honda Civic EX
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Discussion Starter · #19 ·
It's been doing it since I put the turbo on I guess. I've been told a while back that it did it and then again the other night. Only been boosted for like 2.5-3 months. It's probably just running rich sometimes. What makes it only do it when you shift or let off the gas? It's very interesting.
 

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94 civic si
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745 Posts
it happened because you're a little rich, most turbo cars are, and your exhaust got hot enough to ignite the unburnt fuel to make that flame. thats why you see the majority of the cars in like le mans or JGTC throw flames. it can also happen if you've been in boost for awhile and since you were on the interstate its very plausible that you were in boost or near it to make your exhaust really hot. if you run straight pipe it happens a lot more.
 
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