Backfire at WOT

[zoom-zoomhatch]

I'm assuiming it was boost cut, no cel or anything. Runs and drives fine just kinda startled me at first. Anybody have any different ideas?

 

[AutoXRacer]

Have an upgraded exhaust?

 

[mazdaspeed32007]

if you open up that exhaust the major richness of these cars will back fire. mine does it. its kinda cool. lol. it makes me laugh anyways.

 

[zoom-zoomhatch]

I have ets top mount, cpe cold air and tbe exhaust with high flow no muffler. I know it will backfire when you shift, this was when I was on the gas and it kinda stuttered when it did it.

 

[AutoXRacer]

"stuttered"
Seems like you are running out of fuel...

 

[Rotus8]

There are two kinds of backfire; if you are running rich, unburnt gas can build up in your exhaust and pop when the mixture gets right. This almost never happens in a car with CATs.

Much more common is a lean backfire and indicates a significant problem somewhere which can damage your engine.

Start here: http://en.wikipedia.org/wiki/Back-fire

 

[zoom-zoomhatch]

"stuttered"
Seems like you are running out of fuel...

Thought that could be it also, just awaiting funds to order a unit and get it tuned.

 

[AutoXRacer]

Mine backfires too...really loud. But I have fueling issues...though I don't know if that has anything to do with it.

It happens when I shift gears as I press the clutch and let off the gas...POW!!!!

 

[zoom-zoomhatch]

Mine will do that, that is because it runs really rich. I figured by the same logic that when it did it when I was flooring it that it could have been boost cut because that would make it dump fuel and cause a small backfire. I could be wrong.

 

[AutoXRacer]

There are two kinds of backfire; if you are running rich, unburnt gas can build up in your exhaust and pop when the mixture gets right. This almost never happens in a car with CATs.

I even have a high-flow catalytic in my DP... I wonder if the backfiring rule still applies to high-flow cats?

 

[Da 6]

I backfire with HFC on dp but i'm not a ms3.

 

[ericrapp]

Yes

There are two kinds of backfire; if you are running rich, unburnt gas can build up in your exhaust and pop when the mixture gets right. This almost never happens in a car with CATs.

Much more common is a lean backfire and indicates a significant problem somewhere which can damage your engine.

Start here: http://en.wikipedia.org/wiki/Back-fire

Careful, people you hope its rich . Better to wideband it now.

 

[aaronc7]

I even have a high-flow catalytic in my DP... I wonder if the backfiring rule still applies to high-flow cats?

I get the exact same thing. Really loud POP or whatever sound randomly but seems to happen most after a shift. I have a high flow cat too. Intake/TBE only power mods

 

[AutoXRacer]

Weird... Sometimes its so loud, I think the cat must have split in two or three... (lol2)

I would really like to know what backfiring does to the O2 sensors and turbo exhaust impeller... There has to be some kind of sound/pressure waves traveling back toward the engine... (huh)

 

[Shane5425]

put a spark plug on the tip of your exhaust.. let that baby ignite.. that will show you just how riche you are running.. plus 3 foot flames are cool.... lol

 

[AutoXRacer]

put a spark plug on the tip of your exhaust.. let that baby ignite.. that will show you just how riche you are running.. plus 3 foot flames are cool.... lol

I've always wanted to do that... (2thumbs)

 

[Shane5425]

me too.....



weekend project... lol

 

[07speed3]

i assume for the hole spark plug deal to work you have to have some kind of power source correct?

 

[AutoXRacer]

I would assume you need some type of coil to provide the spark plug with spark...

 

[07speed3]

haha hey how can we make the flame different colors like in the movies???? haha jk that would be taking it to far haha