Random fluttering/flapping sound when coming to a stop

[nfaj]

[ame]http://youtu.be/r8uk71jvpmY[/ame]

Here's the vid . Pls take a listen and see if this isn't engine knock . Appreciate it !!!!

EDIT sound happens after 1min mark

[AllStar0419]

Originally Posted by nfaj

Here's the vid . Pls take a listen and see if this isn't engine knock . Appreciate it !!!!

EDIT sound happens after 1min mark

I had the same exact sound. I don't think its knock. I think its the flywheel. I started holding the clutch while slowing to a stop and I don't hear it anymore. Im pretty new to MT so perhaps someone who knows more than me can chime in.

Sent from my Galaxy S4 using Tapatalk

[nfaj]

It's def the engine and not the flywheel.
I can differentiate with flywheel chatter when operating the car in low engine speed. That's when I normally hear the flywheel

[Bristecom]

Yeah... guys, as stated earlier, cars, and sports cars in particular, are not meant to accelerate from that low of RPM. If you have a manual, downshift, or at least slip the clutch more when around 1k RPM. If you're using the auto paddle shifters, just don't let it fall that low.

[Muckraker]

Originally Posted by nfaj

Here's the vid . Pls take a listen and see if this isn't engine knock . Appreciate it !!!!

EDIT sound happens after 1min mark

Mine makes that same sound all the time. Noticed it in the first week or two after I bought it new.
Based on what I've read on the forums, it's a common sound and supposedly nothing is wrong with the car.

It happens when coasting to a stop while in neutral and the engine is at idle speed.
Pressing on the clutch pedal seems to stop it.

And if the air conditioner is turned off, it seems to not happen.

[nfaj]

True that ! Thanks for the info

[cpnslow]

I've noticed this sound as well, and it's definitely connected to the RPM drop. Mines an auto, and I only hear it while stopped and idling, with the AC on. Recently, I've also heard what sounds like a muted jackhammer for about 1 second, when the AC clicks on the the RPMs drop. I'm bringing it in to the dealership this weekend to check it out. I have about 16k miles.

[tomkozski]

Originally Posted by Shutter

Nope, not detonation. Just the sound of the engine almost dying!

Since the rpms drop so much, it causes the engine to feel rough/jerky. I don't wanna say its "normal" but its no harm to the engine. Just feels weird, thats all. If you pick up an OFT, and run one of the base maps you shouldn't have an issue with this anymore.

There's a TSB out there for the RPM drop, if you believe the RPMs drop too much. It's a ECU update - had it done on my BRZ and it solved the RPM drop when the a/c is on.

[continuecrushing]

Originally Posted by tomkozski

There's a TSB out there for the RPM drop, if you believe the RPMs drop too much. It's a ECU update - had it done on my BRZ and it solved the RPM drop when the a/c is on.

yup, x2. I know some people have had issues with their dealer not doing it unless they can "prove it". But if you bitch enough, they should do it for you. It is a TSB after all.

Unless its really horrible, I avoid the dealership as they may fix something that ain't broke or wash my car with sandpaper.

[stonenewt]

Originally Posted by nfaj

Here's the vid . Pls take a listen and see if this isn't engine knock . Appreciate it !!!!

EDIT sound happens after 1min mark

^^ that sounds like anti-stall when the revs have run very low. Normally this is due to bad mapping causing excessing rev drop when entering an idle state. As others have said there's a TSB out so my guess this is what your car is doing.

[nfaj]

Idk if my car is eligible for a tsb since since its a 2015