Popping, crackling exhaust on throttle off...

[T0nyGTSt]

What causes this?

The car runs the FC with perfect A/F ratios. Power is dead strong with excellent throttle response due to some snappy Power Excel tuning.

Fuel economy is admittedly excellent (400km on a tank) and the rear bar is clean. O2 sensor is new.

I know just about everybody (including the tuners!) thinks it sounds mad... but it's driving me up the wall.

T.

[meggala]

do you have a cat if not that could be the cause

[DoughBoy]

Trailing throttle settings?

[gtrken]

Check for an exhaust leak

Cheers

Ken

[rb25]

Take your foot of the go pedal properly . Or maybe check your TPS. I rekon it's pretty normal tho, heard plenty of skylines do it.

[Duncan]

no cat....

[wreckedhead]

exhaust leak i got the same stupid problem.

[predator]

dead cat dead cat..

if it shoots flame definitely somebody has hosed your cat..

[neil_se]

Mine crackles, pops and backfires constantly even though its just been tuned (albeit a bit rich, mid to low 11s). New cat and most of the exhaust is new too. I assumed its just what rb's were like.

[R31Nismoid]

Mine doesnt crackle at all really.

But then, it's got a cat, and im 70% sure it isnt melted (yet)

Most RB's i hear without one crackle!

[BHDave]

Mine pops and farts on trailing throttle, less so now since i took a bit of fuel out higher in the range but it still does it a fair bit.

Also does it if i lift completely at high revs entering a corner and let it go for a couple of seconds before reapplying the throttle.

My cat is less than 6 months old and no exhaust leaks, they were all fixed a couple of weeks back.

I like it as it's only really happening when i'm driving reasonably hard, the rest of the time i just get nothing or a quiet rich pop on gear changes.

[franks]

had this problem before. it went away after i checked my spark plug gaps.

i have a similar setup to you aswell tony, less z32 (but thats in the garage )

[xRHETTx]

Mine pops sometimes when changing gears at 1/2 throttle.

I like it, it sounds cool.

[judd]

umm tony..i think u have antilag setup through the powerfc...