Alright fellas...well it isn't an ITR but it's a prelude. It's my little bros cars. The car has had some track time and minor mods.

The car is a 2001 SH model with:

-N1 catback exhaust
-AEM CAI
-Air/Fuel gauge
And that's it for the engine mods. the other mods are just suspension mods.

Anyway the car will throw out a flame right when VTEC is engaged. The car seems to run fine, feels strong and feels normal. Although when accelerating the air/fuel gauge will read rich from the beginning to the end of the rich zone. Yes he has one of those color meters and not the analog. The meter used to only display a couple of the rich lights towards the end of the meter but now it lights up all of the rich lights.

What's your take on it? No CEL's or any funny symptoms.

Thanks....

 

Intake and exhaust and shooting flames.

He's NEVER had any other mods?

 

Look at it this way at least no one will tail-gate you

 

lol...

Reid~

No...no other mods and he is the original owner.

 

No CEL?

 

Obviously flames can't be good but can it be a serious problem? Like is something broken or just too much fuel?

 

Something has to be broken.

Once we figure out what exactly is broken, we can break more of them and sell them. Can you imagine how many people would love to shoot flames when they hit VTEC?

 

I'll buy one.

 

i got dual exhausts, i'll take 2 then

 

Can there be a switch for it as well

 

Haha I don't mind the humor at my expense but does anyone have any idea to what may cause this? I'm worried that it may be a serious problem. The car does have a warranty on it but the Honda techs in our area are straight up idiots that have no idea about anything other than a d16 civic.

Could the catalytic converter have anything to do with this. My bros called back and said that the car did sound throatier. When he lets off in a low gear it grumbles more than usual.

 

the big bottles and i neem em by tonight

 

At first I thought this was a fast and the furious joke....

I have no clue on your problem bro.

 

Flames in the exhaust = unburned gas self igniting. Usually a sign of running very rich. But you should get a CEL telling that something is wrong (injectors, fuel regulator...)
The throatier sound could be that one of the "back fire" ripped the muffler or another exhaust components open.

 

Wow.

Bad O2 sensor perhaps? That could cause the engine to run rich, but to belch flames like that it's got to be running really rich. And I have no idea what could be igniting the fuel.

 

what happened to your beautiful R?

 

Is it under warranty?
If it is, I suggest you find a good Honda dealer, and bring it there...

Nick
(who has seen rotary engines that spit flame at every shift!)

 

When the concentration of gas fume is high enought in the exhaust system, it will reach it's flash point and self ignite in contact with the hot exhaust.

 

There was a CEL 2 weeks ago and it was for the O2 sensor but it was just the ground wire for the A/F meter that came loose and caused that code. Fixed the ground wire and everything was back to normal. Now this started this past weekend...bursts of flames

 

check the cat maybe...pull it off and look inside.

 

I didn't think a car could spit flame through a cat converter... My guess is that the cat is blown out, and for some reason the car is running extra rich. Check the cat and the O2 sensor... Hmmm.... Mabe an injector is failing, and sprayin more gas than it should...

 

bad o2 sensor, your car is running very rich...its obvious. the flames happen when the unburnt gas is ignited in your piping.

btw have you noticed a decrease in MPG? running rich will drastically(and noticably) reduce your mileage.


[Modified by Razor, 8:48 PM 10/8/2002]

 

Fire is good

 

thats what i was thinking, if it won't seriously damage any part of your car just keep it the way it is...unless you're losing hp by running too rich.

i've seen cars on the highway that backfire and shoot flames when they downshift(at night) and it looks intimidating.

 

Running directly on metal rims spewing sparks and flaming pieces of metal all over the place could be intimidating at night also