Hard ticking noise in 2500-3500 RPM - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Andrei · 12-31-2019, 03:36 PM

hello everyone,

I have a really frustrating problem, trying to find it over 2 months!
I have like a knocking noise, sound like metal ticking, only under load (so I can't check it on stands) only from 2500-3500 rpm from the front of the car
sound like it getting worse with time, now even can be heard from 1500 rpm

the noise started after I fuel in a different gas station then usual
(I refueled 4 times at my regular gas station from then, and even add 15 liters of Toluene)
2 weeks before that I changed my clutch (to OEM one) and changed the final drive on the differential (from 4.1 oem to 4.556)
things I done already to trying to find the noise:
change the shocks+hats, the 2 front hubs, steering ball joints, disassemble the sway bar and the undercar shield.
engine mount, bushings, the two hydraulic timing tensioner, change the clutch again, swap my gear.
i don't have any error code, (my car have ECUTEK+UEL)
check on my live parameters with the ECUTEK scenes like everything is fine, EGT, fuel pressure, knocking etc.
(the car is also feels find, no power loss or something)

I'm so frustrated, tried all kind of good mechanics, I have no Idea what to do next, I will be glad to hear maybe you guys have and Idea

Thanks!

kev0 · 12-31-2019, 04:46 PM

[ame]https://www.youtube.com/watch?v=WAdC7B7xYEU[/ame]

fix: https://www.ft86club.com/forums/showthread.php?t=133606

I can almost guarantee you that it's this.

humfrz · 12-31-2019, 04:51 PM

Quote:

Originally Posted by kev0

I can almost guarantee you that it's this.

Sure does sound like it.

What did you do to fix it?

humfrz

davesrave · 12-31-2019, 05:22 PM

Sure sounds like @ermax solved this. What causes it to break?

Andrei · 01-01-2020, 03:19 PM

Quote:

Originally Posted by kev0

fix: https://www.ft86club.com/forums/showthread.php?t=133606

I can almost guarantee you that it's this.

unfortunately it's isn't it, I checked it

and the noise don't happen after 3500 RPM no matter what, I can track the car and nothing, but on the way home on normal driving it's all the time

gravitylover · 01-01-2020, 05:17 PM

Exhaust header bolt is loose or there's a pinhole leak there. At high rpm you're building up more pressure and it's sort of sealing itself but then opens up and you can hear it down lower. I have something like this happening on my beater suv.

Andrei · 01-05-2020, 11:19 AM

Quote:

Originally Posted by gravitylover

Exhaust header bolt is loose or there's a pinhole leak there. At high rpm you're building up more pressure and it's sort of sealing itself but then opens up and you can hear it down lower. I have something like this happening on my beater suv.

already checked it, it wasn't it

Andrei · 01-05-2020, 03:39 PM

I found the problem, it was one of the direct injectors,
why? don't know yet, maybe the fuel? maybe detonation?
changed one and the knocking vanished.
why we didn't see any fault on the ecu? even when doing live logs on every parameter

hope my tuner have an answer for that.
interesting if on the stock map it was giving an error

12-31-2019, 03:36 PM	#1
Andrei Member Join Date: Jul 2014 Drives: Leon4x4 PRECISION6466,buyng soonBRZ Location: Israel Posts: 14 Thanks: 0 Thanked 7 Times in 6 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Hard ticking noise in 2500-3500 RPM hello everyone, I have a really frustrating problem, trying to find it over 2 months! I have like a knocking noise, sound like metal ticking, only under load (so I can't check it on stands) only from 2500-3500 rpm from the front of the car sound like it getting worse with time, now even can be heard from 1500 rpm the noise started after I fuel in a different gas station then usual (I refueled 4 times at my regular gas station from then, and even add 15 liters of Toluene) 2 weeks before that I changed my clutch (to OEM one) and changed the final drive on the differential (from 4.1 oem to 4.556) things I done already to trying to find the noise: change the shocks+hats, the 2 front hubs, steering ball joints, disassemble the sway bar and the undercar shield. engine mount, bushings, the two hydraulic timing tensioner, change the clutch again, swap my gear. i don't have any error code, (my car have ECUTEK+UEL) check on my live parameters with the ECUTEK scenes like everything is fine, EGT, fuel pressure, knocking etc. (the car is also feels find, no power loss or something) I'm so frustrated, tried all kind of good mechanics, I have no Idea what to do next, I will be glad to hear maybe you guys have and Idea Thanks!

12-31-2019, 04:46 PM	#2
kev0 Senior Member Join Date: Feb 2018 Drives: '14 Location: Midwest Posts: 485 Thanks: 246 Thanked 99 Times in 76 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	[ame]https://www.youtube.com/watch?v=WAdC7B7xYEU[/ame] fix: https://www.ft86club.com/forums/showthread.php?t=133606 I can almost guarantee you that it's this. Last edited by kev0; 12-31-2019 at 04:56 PM.

01-01-2020, 05:17 PM	#6
gravitylover Senior Member Join Date: Nov 2014 Drives: 2013 BRZ Premium 6MT White Location: SE NY Posts: 1,503 Thanks: 1,218 Thanked 669 Times in 474 Posts Mentioned: 7 Post(s) Tagged: 1 Thread(s)	Exhaust header bolt is loose or there's a pinhole leak there. At high rpm you're building up more pressure and it's sort of sealing itself but then opens up and you can hear it down lower. I have something like this happening on my beater suv. __________________

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12-31-2019, 05:22 PM	#4
davesrave Senior Member Join Date: Apr 2011 Drives: 2014 Boxster S; 2015 Macan S Location: MA Posts: 206 Thanks: 326 Thanked 233 Times in 63 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Sure sounds like @ermax solved this. What causes it to break?

01-05-2020, 03:39 PM	#8
Andrei Member Join Date: Jul 2014 Drives: Leon4x4 PRECISION6466,buyng soonBRZ Location: Israel Posts: 14 Thanks: 0 Thanked 7 Times in 6 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I found the problem, it was one of the direct injectors, why? don't know yet, maybe the fuel? maybe detonation? changed one and the knocking vanished. why we didn't see any fault on the ecu? even when doing live logs on every parameter hope my tuner have an answer for that. interesting if on the stock map it was giving an error

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