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Old 09-12-2017, 05:51 PM   #29
TheBRZsKnees
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This is what I'm hearing. Over a month now, and no performance issues, so there's that at least.

[ame="https://www.youtube.com/watch?v=dv1WXorjwmg"]BRZ Ticking Sound - YouTube[/ame]

Last edited by TheBRZsKnees; 09-12-2017 at 06:34 PM.
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Old 09-13-2017, 04:26 AM   #30
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Originally Posted by ph4zon View Post
This is what I'm hearing. Over a month now, and no performance issues, so there's that at least.

I'm going to double down on vacuum pump. I found the other clip I heard a while back. Sounds similar in frequency compared to engine speed but this one makes noise on idle.

[ame="https://www.youtube.com/watch?v=qIlHnd39iHU"]Scion FRS, Subaru BRZ, Toyota GT86 engine rattle noise after warmed up. - YouTube[/ame]




Another one from inside the cabin. Sounds just like yours.

[ame="https://www.youtube.com/watch?v=oGYvg5IFy3o"]Toyota GT86 weird knocking sound (FIXED!) - YouTube[/ame]
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Old 10-13-2017, 06:56 PM   #31
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The sound was coming from my boost solenoid. I had mounted it to the front core support, and when the evaporative emission purge circuit activated it, it made that knocking noise.

My tuner had initially left the purge circuit disconnected. A local shop had connected it when I had it in for something else. They returned it to its original state, and all seems to be well now.
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