Idle tip-in/throttle blip knock

[tomm.brz]

Originally Posted by Nfsundrgrnd

Got the Log right here!

https://www.dropbox.com/s/k0uqa9cnq9...Knock.csv?dl=0

No knock correction which is interesting...

buddy you have an advance multiplier of 0.27
your engine is EXTREMELY knocking in various zone all the time


Good thing is the problem is found, just read a bit above

[tomm.brz]

Originally Posted by Nfsundrgrnd

This is currently with the stage 1 OFT tune as well.

well, the injectors oring were already toasted by the stock tune
So ofc is going to POP loudly also with the stg1 tune

[tomm.brz]

Here photos also from the tsb bulletin

https://www.ft86club.com/forums/showthread.php?t=41130

[Clipdat]

Originally Posted by Nfsundrgrnd

So I got a video of the knock, you can hear it loud and clear once I put the camera outside. I also logged these blips but gonna need to upload it later.

Sounds almost exactly the same as mine, but I can't replicate it each and every time like you can. But yeah, it sounds nearly the same. Ugh.

[Nfsundrgrnd]

Originally Posted by tomm.brz

well, the injectors oring were already toasted by the stock tune
So ofc is going to POP loudly also with the stg1 tune

So replacing the injector O-rings should fix this?

[tomm.brz]

yes
and then be sure to have a better tune than your stock's

if you take a video with engine bay open it should be more clear if it s the oring popped
you d possibly hear from which cylinder it comes

[Clipdat]

Maybe mine aren't fully gone yet and I can get away with just flashing to OTS tune and living with it. Cuz this looks like a PITA fix that's above my abilities:

[tomm.brz]

yes it is a bit technical the swapping, also need to buy 4 original oring and to mount them you need a special tool that Subaru/toyota sell

[Nfsundrgrnd]

Originally Posted by tomm.brz

yes it is a bit technical the swapping, also need to buy 4 original oring and to mount them you need a special tool that Subaru/toyota sell

I would've thought they would swap those when they swapped my short block at the dealership last June. But maybe the tune popped the new ones in that time? Or the dealership cheaped out and didn't replace them.

[tomm.brz]

usually it is not required to swap them, i didn t when i opened the engune, they are not consumable it just happens that with the bad stock tune they destroy

[Nfsundrgrnd]

Originally Posted by tomm.brz

usually it is not required to swap them, i didn t when i opened the engune, they are not consumable it just happens that with the bad stock tune they destroy

Makes sense. How long of a job would this be? Seems like I need a bunch of parts from that video. Might just get the dealership to swap it if it's not an arm and a leg. Hard to work on cars in an apartment parking lot lol.

[Clipdat]

If it was DI seals would it also be making unwanted knocking/popping noises during spirited/hard acceleration say a 10-80 pull?

[tomm.brz]

usually if a oring is missing it just makes the loud pop on quick blips at any rpm, anyway if in doubt just have someone blip on ur car while you are in the front with bay opened, it s pretty obvious if a loud pop comes from the heads
i ve seen videos even with a small cloud of vaporized fuel fuming out of the injectors some years ago

[fredzy]

Originally Posted by Nfsundrgrnd

So I got a video of the knock, you can hear it loud and clear once I put the camera outside. I also logged these blips but gonna need to upload it later.

My 23 makes more or less this same sound doing the same thing. Piston rattle knock/clacky sound. Did it off the lot.