help!! ENGINE sound soft....

[Mimmer]

i just switched to a new filter (Active Autowerke BMW) and it was sounding great n noticed a tad difference in performance. After a week of driving i didnt drive it for 2 days and now for 2 days straight it seems like the my high revving v8 is like really quiet even when i go into paddle shift mode the down shifts sound quieter ... anyone have any ideas why my engine and revs sound so soft now?

I was thinking switch out to my old filter but i think there is something else going on???

couldnt find any threads about my issues, if there is pleas point me in the right direction.

[amrazM]

It’s definitely you. Put it into s4 or s5 and downshift above 3k rpm.

[Mimmer]

Kk I'll give it a try...

[Mimmer]

hmmm no its def not me, its almost like no sound is coming into the cabin anymore...

[Bartledoo]

This wouldn't make sense unless you had a large intake leak, or an exhaust leak, which sealed itself.

[Mimmer]

i placed back my stock air filter but idk if its taking time for the ecu to learn it? but i still feel my car lost some performance n induct sound had decreased...

should i do a reflash? i was thinking replacing the battery too which is do soon...

[Mvy]

The induction noise comes out of the open hood vent. If you just changed the air filter back to stock, that has to have something to do with why its quieter. The stock filter absorbs a lot more sound than say an k and n cone filter. the plastic housing also reduces the volume as compared to a metal one if you went from one to the other.

[Bartledoo]

Originally Posted by Mvy

The induction noise comes out of the open hood vent. If you just changed the air filter back to stock, that has to have something to do with why its quieter. The stock filter absorbs a lot more sound than say an k and n cone filter. the plastic housing also reduces the volume as compared to a metal one if you went from one to the other.

He said the it got quieter with the aftermarket filter still installed though.

[Mvy]

Originally Posted by Bartledoo

He said the it got quieter with the aftermarket filter still installed though.

It must have something to do with the filter selected.

[Mimmer]

thanks guys. i did switch it back its almost a week now so hopefully the car magically learns its a different filter....

maybe i will also do another oil change ...

any other thoughts before taking it to the mechanic and coughing up serious money? my car is at 63k miles almost... would a bad spark plug show up in my dash?

[Bartledoo]

Did you have the rear seat folded down for the first couple days and then folded up after? Honestly, it sounds like you just got used to the sound otherwise. If everything was installed correctly and the engine is running well then there probably isn't an issue that would all of the sudden make your engine sound quieter.

I wouldn't advise taking it to a mechanic with this story. You will probably get taken for a ride.

[GORDON.M3]

I've had this problem also but cleaning out the filter or replacing it makes a difference I know that for sure.
As long as your car is not throwing codes and revving happy to 8K, I wouldn't worry too much.

[Mimmer]

im waiting on another new oem filter come in tomorrow.

even in power switching to sport and like normal i dont notice a difference anymore... if anything normal power drives like its in sport power mode..... if that even makes sense...

[Bartledoo]

You trollin us?

[doogee]

Originally Posted by Bartledoo

You trollin us?

Yes he's trolling lol.

[Bartledoo]

Originally Posted by doogee

Yes he's trolling lol.

...Fak

[Mimmer]

damn i wish i was.... sigh. sounds like a money pit since no ones seems to have run into this..

[Mimmer]

update*** anyone looking at this or running into the same issue. I switched back to a new OEM filter and after a few days it went back to normal... idk if i bought a fake filter or what.. i'll probably look into another filter and see if this happens again. hoping not...

[maestrodevil]

Originally Posted by Mimmer

update*** anyone looking at this or running into the same issue. I switched back to a new OEM filter and after a few days it went back to normal... idk if i bought a fake filter or what.. i'll probably look into another filter and see if this happens again. hoping not..

Hi Mimmer ,

I'm facing the exact same situation. Installed an AFE Intake and I think the intake leak is the issue. Regardless of how much I try, the intake just won't sit right and I can see leaks couple of places. I'm going to return this.

[Mimmer]

Originally Posted by maestrodevil

Hi Mimmer ,

I'm facing the exact same situation. Installed an AFE Intake and I think the intake leak is the issue. Regardless of how much I try, the intake just won't sit right and I can see leaks couple of places. I'm going to return this.

Originally Posted by maestrodevil

Hi Mimmer ,

I'm facing the exact same situation. Installed an AFE Intake and I think the intake leak is the issue. Regardless of how much I try, the intake just won't sit right and I can see leaks couple of places. I'm going to return this.

Yeah strange… I stuck with oem ever since. But if you're seeing leaks then that makes sense. Mine was just the filter and I work on my car often. And drive it as a DD so I notice these things….

[maestrodevil]

Originally Posted by Mimmer

Yeah strange… I stuck with oem ever since. But if you're seeing leaks then that makes sense. Mine was just the filter and I work on my car often. And drive it as a DD so I notice these things….

Same here bro. I too daily my M3 and work on it too, and it's hard not to notice anything different good or bad. Was expecting a lot from the intake, and it's a let down for me.

[Mimmer]

Originally Posted by maestrodevil

Same here bro. I too daily my M3 and work on it too, and it's hard not to notice anything different good or bad. Was expecting a lot from the intake, and it's a let down for me.

Lmk if it sounds all normal right away after putting back to stock. idk even with some minor air leaks I feel should be dramatic but maybe the v8 is truely sensitive lol