Exhaust doesn't crackle/ pop anymore ?

solo_the_lad

solo_the_lad

Member
 Colorado, USA
I deleted the muffler from my z4 a while back, and with that alone it would make wonderful crackle and popping noises. But not too long ago it stopped doing it as much. I haven't modified the engine/ exhaust/ intake in any way since the muffler delete. Anyone have any idea on what it could be?
 
That's very strange, something has obviously changed , maybe the fuel mapping but it could be carbon build up.
 
I think it's snapped somewhere.
Can you see what I did there?
snap, crackle, pop.
or rather snap, no crackle, no pop
:lol:
 
TOMGREEN413 said:
That's very strange, something has obviously changed , maybe the fuel mapping but it could be carbon build up.
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What do you mean by fuel mapping? As for carbon build up, it seems that would be unlikely since its only got about 76k miles on it, but I don't know much about carbon buildup so I suppose it is possible.
 
solo_the_lad said:
TOMGREEN413 said:
That's very strange, something has obviously changed , maybe the fuel mapping but it could be carbon build up.
Click to expand...
What do you mean by fuel mapping? As for carbon build up, it seems that would be unlikely since its only got about 76k miles on it, but I don't know much about carbon buildup so I suppose it is possible.
Click to expand...
What do l mean by fuel mapping.......too complicated to try n explain here, but Internet research will explain.
 
Don’t know if it’s really of any significance in your scenario, but I think on mine the engine and exhaust need to be pretty warmed up for audible burbles when lifting the pedal.
 
Have you had your hearing tested lately?….

Maybe the un-silenced exhaust has burst your eardrums :tumbleweed:
 
True-Blue said:
Have you had your hearing tested lately?….

Maybe the un-silenced exhaust has burst your eardrums
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Sorry could you repeat that? :D
 
DMike said:
Don’t know if it’s really of any significance in your scenario, but I think on mine the engine and exhaust need to be pretty warmed up for audible burbles when lifting the pedal.
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oi yes even after being properly warmed up it makes no difference
 
If you remove the exhaust padding then presumably that reduces back pressure. Could the ECU be sensing this and adjusting timing, fuel or whatever such that popping is reduced.
 
Mike6 said:
If you remove the exhaust padding then presumably that reduces back pressure. Could the ECU be sensing this and adjusting timing, fuel or whatever such that popping is reduced.
Click to expand...
Also known as the ASRM (Anti Social Rectification Module). :D
 
Mike6 said:
If you remove the exhaust padding then presumably that reduces back pressure. Could the ECU be sensing this and adjusting timing, fuel or whatever such that popping is reduced.
Click to expand...
what do you mean by exhaust padding O.o
 
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