Stagea Backfire?

[bluesky4me]

Hi all..My stagea has a nice big exhaust and a blow off ...every once and a while it dose a little back fire when backing off the gas...could this point to a problem of some sort or is it normal?

Scott.

[AlexCim]

If the backfire is a burble when you let off, this is 100% fine and happends with most larger exhausts...

Also, if the BOV is atmo, it will make the car run rich on gearchanges would could partially attribute to the backfiring

Is it backfiring as in BANG BANG or just pop pop?

[timmmay]

sounds to me like she's runnin a bit rich!

[bluesky4me]

Its just the one pop (smaller than a full on loud backfire but bigger than a burble)...I think your diagnosis of running rich is on the money cos I have also found a decent amount of sooty residue on the tailgate ledge which I think indicates the same...

Thanks.

[Tangles]

As soon as I read it, I thought "running slightly rich".

Its all good...... great excuse to do the SAFC or similar!

[Mr_RS4]

Mate pretty simple, if your BOV is atmo (in other words goes psshhht!) then 99% chance its your problem. Nothing to worry about really. If it really bothers you then get a plumb back BOV or get rid of the AFM. BOV's on AMF cars tend to richen the mixtures when you back off the throttle which gives you your back fire.

[Ska]

Running rich, my r33 ran mega roch with the same mods, flames were huge sometimes!