Car "popping" And Occasional Backfire With Flames...

[CaptainFresh]

I have looked through the forums and have come up with a few posts, but all seem to be different to my situation

Put simply my car is Basically Stock, Pod ( in a insulated box ) and a 3Inch turbo back Stainless exhaust. 4inch hotdog in the middle and a very free flowing Cat

other then that completely stock, no boost controller, turbo timer, bov etc. so nice and stock

Once the car is at a operating temperature, It will give occasional little "pops" and after a good 5minutes of driving aggressively it will shoot flames with a nice bang.

now im not complaining. it sounds great and looks awesome,

it's not running rich, or Lean I am getting on average 380-500kms per tank and 10-12L per 100km. with a good 10L left in the tank when I fill up.

now, everyone else is blaming the cars, tuning or lack of a cat. I am assuming mine is simply because of the cat.

As everyone in other posts have recently had a Tune or car is running badly etc and mine is not, I figured I should simply ask

I am also not losing power etc. have had this exhaust for 7 months, from the moment it went on the car did it. nothing has changed since

if there is a post I missed explaining this further, my bad, guess ill look harder next time.

Edited December 13, 2014 by CaptainFresh

[Ben C34]

Do you have no bov or factory bov?

[CaptainFresh]

factory. as I said the car is stock.

[GH05T]

"have had this exhaust for 7 months, from the moment it went on the car did it"

"it's not running rich, or Lean"

"everyone in other posts have recently had a Tune or car is running badly etc and mine is not"

"I am also not losing power etc"

i might have missed the actual question?

Edited December 13, 2014 by GH05T

[Ben C34]

Ahh k.

You wrote no bov .

See how I was confused?

[CaptainFresh]

.... wow, I forgot to actually say my question. simply put,

would my car be doing this because of the exhaust or is there a more serious underlying problem, as the car is still running beautifully i'd like to double check

[CaptainFresh]

I was meaning no aftermarket bov. the car is "nice and stock" didn't think I had to specify everything that was stock. as I already said the 2 only mods on it.

Put simply my car is Basically Stock, Pod ( in a insulated box ) and a 3Inch turbo back Stainless exhaust. 4inch hotdog in the middle and a very free flowing Cat

other then that completely stock, no boost controller, turbo timer, bov etc. so nice and stock"" thought that was fairly clear.

[GH05T]

i would say if you put a big exhaust on with a "very free flowing cat" and from that day it started it then i would highly suggest this is the cause, but if its only causing this then i doubt there is any other underlying issue.

if it were me maby its time to get it tuned a little

[Ben C34]

I wouldn't worry about it.

Perhaps it's running a touch rich, well it would be due to not being tuned. They all run too rich.

I asked about the bov as people consider (incorrectly) running no bov or a blocked bov is still stock.

[niZmO_Man]

Should be fine. My GT-R did that but I had weak coilpacks and AFMs. As mentioned, they run a little rich from factory, the exhaust accentuates this.

[dopey]

When i noticed mine doing it i figured the larger exhaust would allow more air in it and once the standard cast manifold and dump pipe get hot just ignite any left over fuel.

[Dose Pipe Sutututu]

Check your base timing

[blind_elk]

You don't say exactly what condition causes it to "pop". It might be that the TPS isn't shutting off correctly, causing the engine to over-fuel on gear changes (throttle closed situations).

The flames can often be caused by a small leak in the exhaust that allows fresh air to be drawn into the exhaust to mix with hot fuel-rich gasses, creating an explosive mixture.

[Hadouken]

What about over run?

[Got a Pulsar]

Is the car Manual or Auto?

I only ask as mine was factory Auto but converted to Manual but still had the Auto ECU.

It would pop etc when off the throttle (especially with gutted cat).

Changing to a Manual ECU reduced it.

Edit* Great Flame Photo too.

[Whoa Black Boaty]

Are you worried about damaging your car or getting in trouble with the police?

Edited December 13, 2014 by SkylineR33RB25

[Ben C34]

Won't damage car.

If you go past police at full noise your screwed anyway.

[CaptainFresh]

Ok thank you for the replys, the car is factory manual. So not concern with Ecu.

I will be getting a tune once I get a intercooler anyways...

No leaks in the exhaust, all brand new. no loose bolts etc.

It seems to do it very often.. since do writing this I've got my mate to follow behind. Once I've been driving for 20 or so, of normal driving. If I full throttle through 2nd, as soon as I change gears a nice big flame.. makes for great footage lol

Very noticeable at night, scared the crap out of me, thought I went past a speed camera

Not concerned with police, I live in a semi rural location. The police station closes at 4 in the arvo, so basically the police dont care

I am more concerned with the possibility of it doing damage somehow.

Thanks for the info/help.

[niZmO_Man]

As an experiment, try swapping the AFM.

[hardsteppa]

would imagine flames would give you 1000x street cred in semi rural area....?