Unknown Engine Rattling (Video)
 

This happened only once before about 700 miles ago so this is only the second time this has happened. 14000 miles on the car. I only could hear it when I applied throttle. I pulled over after 10 minutes or so of hearing the sound and shut my car off and let it sit for about 5 minutes. once i turned it back on the noise was gone. I've never heard anything like this before so if anyone has experienced this before and has some insight please share and enlighten me :)

Mods - OFT stage 1 tune

[ame="https://www.youtube.com/watch?v=MZOgXGdjzLI"]Unknown engine sound - YouTube[/ame]

[ame="https://www.youtube.com/watch?v=tKeghvH6z2c"]Unknown engine sound 2 - YouTube[/ame]

Very hard to hear, you are right in that VVT/Cam angle change spot between 3000-4000 RPM. Depending on the tuner it could just be that cam angle switch.

Listen at the 3:12 mark is this the same rattle you hear after I go into 4th?

[ame]http://youtu.be/wGcv6SKj858?t=3m16s[/ame]

Did you check to see if there were pliars in your engine?

Seemed to be a common occurance.

Unknown Engine Rattling (Video)
 

Actually, yes it does sound suspiciously similar. The thing that gets me is that it was occurring through the entire RPM band, and once I turned my car off and then turned it back on it was nonexistent. There was not even a hint of it. If I had a stereo mic instead of my phone to capture it better it would be very obvious even below 3000 rpm.

My tune is from shiv using the open flash tablet. I'm following your thread regarding the valvetrain noise that's occurring in some cars and I find it interesting that some cars have this valvetrain noise while others don't. for the longest time around 4K there was definitely a shift in engine note were it sounded much more aggressive but still no valvetrain rattle.

I barely cannot hear anything. like Dezoris mentioned, it sounds normal?

I have heard that exact same rattle on 2 occasions several thousand miles between happening; and both times it went away completely before happening again.

Now, I know you don't want to hear this, but it happened again one more time except it didn't go away that time. The result was I towed the car to the dealer, and they ended up having to order me a new short block as the motor had failed. I'm still waiting for them to get my new engine working properly so I can get my car back.

I sincerely hope your rattling is an unrelated cause, and that your motor is fine, but I had to share the info either way. If you get it resolved, please share.


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I've had this same rattle on 2 occasions as well, happened a couple months ago, both times after driving on a 200 mile trip. I figured the car was tired or something, let it rest and it wasn't there the next day and hasn't happened since.

That's pretty concerning to hear but better me knowing than not.

Was anyone here completely stock? Tune ? Exhaust? Pulley? Anything?


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drop in air filter...perrin intake tube..that is it

Does anyone think his timing is off? ECU problem?

Only TRD exhaust on mine. Stock otherwise.

Interesting. Those mods are really minimal.
@AVodka14 is that possible? Even with stock tune? If so I wonder how that could even happen. I'm not educated enough on this stuff to know.

I'm heading to the dealer for my 15000 mile service and I'm going to inform them about this. And I might share your story with them as well @Mr 286

I'll report back with whatever they have to say.


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They'll probably say "Cool story bro" or something to that effect anyway.

The most I'd expect from them is to keep an eye out for metal fragments in your oil. You may even want to talk to them about investing in a good magnetic drain plug.


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Not sure my man. Just makes sense to me. There are very well educated people in this forum that can chime in. That's why I mentioned that as a possibility.

This is why I love the community here so much. I've learned a lot but still have way more to learn


Edit: there's a saying : if you're the smartest person in the room, you're in the wrong room :)

Me too!

Unknown Engine Rattling (Video)
 

I just dropped it off at the dealer for my 15k service. I was lucky because we was cool about it. He even listens to the videos and said he would investigate. And I told him to look for metal shavings in the oil like mentioned before. Well see what he has to say when they call me in a few hours


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Unknown Engine Rattling (Video)
 

Got my car back from toyota today. While it was there they heard my crickets and replaced my fuel pump.

They had their mechanic who owns like 10 Subarus and is considered the "Subaru guy" work on my car. He said he was pretty sure the clanking was coming from the high pressure fuel pump as well. We shall see...

It's too bad because I was planning on running e58 but @Mr 286 story has me hesitant. Not to mention the dealer I bought the car from offers an unlimited power train warrrenty. So pretty much the entire time I plan to own the car. It's pretty hard to convince myself to throw on a few bolt ons and a tune if I'm chucking the unlimited warranty out the window.

..first world problems : (

I was hoping for good news OP. I had my fuel pump replaced on the recommendation of service advisor some time ago, and honestly I'm not sure I'm happy that the dealership took my car apart at all especially now that the engine died. It made no difference. It'll be a month that it's been down in a few days so I'm still waiting to see how it turns out.


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I'm completely stock.

My car sat the whole week while I was away. Last night I drove it to a friends house. I left about 7hrs later. Started the car and was just letting her warm up a little and heard this exact noise for 10 seconds before I hopped out of the car, to listen under the hood. Couldn't hear anything. Not sure if it stopped or what. Never heard it before.

I drove home and gave the car a good trashing to see if I could make the noise. Absolutely nothing. I'll report back here if I hear this noise again.

It's been two weeks since I brought my car to get serviced. They replaced the fuel pump while I was there and they said that that was the cause of the strange clanking as well.

The chirping is now back again. And it's twice now started clanking and rattling again on two separate occasions in that two-week time period.

I'm honestly just waiting for the engine to blow. Getting pretty fed up with this car


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:-(


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Good news is you're still covered under the warranty if something happens.


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Unknown Engine Rattling (Video)
 

Very True, that's the only thing that's keeping me feeling somewhat ok.

I'm following you're engine failure thread.. Looks like you've move on to subjectively greener pastures. Or I guess I should say more problem free pastures. You're driving a camery now?

Going out on a limb but I've heard that kind of sound from a sloppy cam chain tensioner, no?

Deferring to Dezoris' observation. I have only a couple months on this engine so my ears perk up to every little sound like a yorkie terrier.

Yes, and I love it. I'm not really missing out on the FR-S's sports car handling here in Vegas. I mean, this city is a flat grid of streets for the most part, and I rarely ever explored its capabilities.

People slammed on me for being critical of the car reliability-wise after suffering several issues and an engine failure lol I mean, how did they expect me to feel about it? One of my best friends runs a full service and performance auto shop here in town. I've seen many cars take hits harder than mine did and they're still running today on original engines, including one of my first cars. I will probably miss FR-S when I visit my brother's place in Romona, CA. Climbing those hills on the way to his house is like a touge.


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May have herd something similar today but not sure??? Came to a stop after cruising for a stretch on a highway at about 65 and I hear a sound I never herd before, wife looks at me and says was that a tractor? May have been another car beside us but not sure, never herd it again after that today and the car ran fine. Only have 800mi on the car but keeping my ears open now...


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Tractor noise happened again coming to a stop. Not as loud now as the resonator has been removed feeding engine noise into the interior...

It's been a while since I've posted but it's definitely happened to me like 8 or 9 times total. And no loss of power or signs of this about to explode. It did it again today on the highway and I threw it in second and took it to 7.5k to see what would happen while it was making the noises. If the engine is gonna blow up I want it to happen already!! I need to know!

I think it's something with the DI switching over or something. Goes away and car runs fine...

Unknown Engine Rattling (Video)
 

Interesting. Haven't heard that theory yet. Im really hoping it's a non detrimental sound: I'm dying to run e85 but I'm afraid of noise! That Effin noise. I'm gonna have nightmares about it. Once I get the OFH installed im tempted to go e85 with the oft and say Eff it

one of ur direct port injectors not work fine and u have to change it .

http://www.ft86club.com/forums/showthread.php?t=66620

I listened to your videos and read through your post. You sound very confident that is the problem. How are you sure?

it happened to me twice . after 5k RPM ur car will back to normal condition, flying fast >< .


Subaru recommended change set of direct injectors + the delivery pipes after the fuel regulator . coz of high pressure

sound like an injector seal failure.
As for why its only doing it sometimes and seemingly randomly, that could be due to temps, differing fuels, different loads. any number of things.


But, in your first video it almost sounded like a spun bearing. Most likely just poor sound quality.

I would tell your dealer to replace all your injectors, seals and check all lines/rails.

yoyo direct injector seal failure coz lost of pressure in the cylinder that make CEL about cylinder pressure and can not rev up to 7400 RPM .

brz frs gt86 and 86s firsts income 2012 had bad ignition table that cause DI failures . it fixed by update the ECU

Mine sounds familiar.. Threw on an intake and i was fine after i got a ft86 tune i started hearing the noise. but im still getting my tune Confederated so ill bring it up

Have you flashed back to stock tuning to see if the noise persists?

Unknown Engine Rattling (Video)
 

I have not, and I probably should. Thats a good idea. Ill flash back for week or something and see if it happens.

I moved to Boulder Colorado from St. Louis about three months ago and that's when it started happening. I was running the e85 open flash tablet tune in St. Louis for several months before I moved and I never got that sound.

Since the move I went back to the stage 1 tune and have been on 91 oct out here.

Unknown Engine Rattling (Video)
 

So long story short. The dealership can't seem to reproduce the clanking and now want to get Toyota involved.

I flashback to stock but should I be worried about the flash counter on the ECU. I wouldn't normally worry about it but since they're getting actual Toyota technicians to come look more deeply at the problems I want to be a bit more cautious.


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