Strange noise/vibration under heavy engine load

[BRZSTIAZ]

I have this too. If someone knows exactly what it is please chime in.

[evo4g63]

Can someone pots a video of the issue?

[Mikem53]

Originally Posted by Jaylyons1

I'm getting this sound now too. 2200ish miles. Also have the crickets and a very odd lope. Kind of sounds like it's misfiring. On top of this, last night I walked out to the garage and the rear of the car just started buzzing. I didn't even touch it.

Needless to say, it's in the shop now and I'm rocking a loaner Outback.

The buzzing noise with The car off is the fuel pump and the fuel system doing maintenance to the Fuel evaporation system. It occurs about five hours after you stop the car. Really weird, but it's normal and they all do it.

[Jaylyons1]

Originally Posted by Mikem53

The buzzing noise with The car off is the fuel pump and the fuel system doing maintenance to the Fuel evaporation system. It occurs about five hours after you stop the car. Really weird, but it's normal and they all do it.

Ah, good to know. I just happened to go off when I walked by the car this time. It was like it was growling at me.

[Wattage]

My frs has developed what i think is this same problem just over the last week. The rattle happens at ~5k+ RPM when in gear. Sounds similar to how it sounds when you stick your finger in a fan.

Im at toyota right now having them look at it.... they tried to tell me it was the DI kicking in (lol). I said to them, ok, why did it only start in the last week? Then i took a mechanic for a ride and hes like ooooohhh theres the sound. So we'll see what they say now.

[Wattage]

Hmmm so they didnt find anything loose..... now they say they contacted toyota technical; who want them to take a recording of the sound and give it to them. They say theyve never encountered it before... sheeeeeeeeit

[Foobar]

For USDM cars, the underbody panels need some extra washers on some of the bolts because we're missing the underbody panels that go over the sides. The bolts were designed to hold both center and side panels overlapped, but without the side panels in place, you end up with a gap. If memory serves correctly, there were about 4 bolts that I had to do this to.

I'm not saying that this is definitely the cause of the noise, but it helped in my situation.

[juliog]

Originally Posted by Chele

Did someone find out where this rattle is coming from? It happens at 4k rpm and it goes away by 4300 rpm . It sounds like a loose heat shield. Only happens under load.

^ same thing here. Started experiencing this after flashing a base EcuTek stg 1 tune, probably unrelated but a coincidence nonetheless..

[RED_CAR]

UP !

I have the problem and I try to fix the bolts of the under engine cover with washers without success.

No sound generator on my car...

[Mr 286]

Originally Posted by Foobar

For USDM cars, the underbody panels need some extra washers on some of the bolts because we're missing the underbody panels that go over the sides. The bolts were designed to hold both center and side panels overlapped, but without the side panels in place, you end up with a gap. If memory serves correctly, there were about 4 bolts that I had to do this to.

I'm not saying that this is definitely the cause of the noise, but it helped in my situation.

Almost the same here. My underbody panels rattled as well. A bolt had worked its way loose. It was found and fixed. Noise didn't come back since.


Sent from my iPhone using Tapatalk

[BeRZed]

I've been getting a loud noise and rattle on a few occasions too, but only when I'm in reverse. Happened since I got the Nameless overpipe/downpipe installed. Anyone know what it might be?

[Roarke]

Originally Posted by Panecki17

The latest strange noise coming from my BRZ crops up while accelerating hard between 4k - 5.5k RPMs. It's a hard noise to describe, but it sounds like a combination of spring peeper frogs (not crickets) and a dial-up modem. Again, this only happens when the engine is under heavy load. It doesn't happen during normal driving/acceleration.

Any idea what might be causing this?

My first thought is that it might have something to do with the port injectors activating around these RMP's, or maybe it's just a vibration in the noise generator. I haven't done the noise generator delete yet, but I'll see if that helps.

I have same issue.. Its around 6k rpm.. And i was scared like hell when it happen first time..

Its not happening everytime, so its very hard to reproduce.. Anyway, even I show it to subaru mechanic, they didnt find anything

They were only surprised that I drive it so hard 5-7k rpm

[unlimited86]

I got the same issue today after washing my car, got it up above 5k and it started rattling. Has anyone able to resolve the issue?

[Slonie]

Originally Posted by unlimited86

I got the same issue today after washing my car, got it up above 5k and it started rattling. Has anyone able to resolve the issue?

It sounds like there are at least two plausible suggestions for the cause and solution of this noise... I'm going to look into them both as I've noticed the same when pulling around 5k...