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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


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Old 11-12-2018, 10:48 PM   #1
Dr. BRZ
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Crackle pops during wot

As the title says, my problem is when i wot during high rpms, the car will stall and make crackle pop sounds. When it does that, it won't let me go pass that high rpm for example 6000rpm. The needle just keeps bouncing off at 6000. I cant redline to 7600rpm. I am fbo and tuned on e85. I have replaced the clutch switch and same problem occurs. Can it be the injectors? Or something else?
I have changed the spark plugs and heat wrapped the ignition coils.
Besides wot, the car drives just fine.
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Old 11-12-2018, 10:57 PM   #2
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Is the rev limiter changed ?



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Old 11-12-2018, 11:03 PM   #3
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Is the rev limiter changed ?



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I have it at 7300rpm.
I can't even get to 7000rpm.
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Old 11-12-2018, 11:21 PM   #4
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Stop doing it and get it on a dyno for some diagnostics.
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Old 11-13-2018, 12:14 AM   #5
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Stop doing it and get it on a dyno for some diagnostics.
It doesn't throw any cel
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Old 11-13-2018, 12:16 AM   #6
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Perhaps try reflashing your tune ?


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Old 11-13-2018, 12:47 AM   #7
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It doesn't throw any cel
Maybe a coil, a plug, AFR????

If it's popping on throttle that's a bad thing.
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Old 11-13-2018, 01:12 AM   #8
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Could the problem be related to direct injector seals? They're known to make a popping/crackling sound when they fail.
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Old 11-13-2018, 11:27 AM   #9
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Bad fuel?
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Old 11-13-2018, 12:38 PM   #10
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Could the problem be related to direct injector seals? They're known to make a popping/crackling sound when they fail.
Thats what i am thinking and hopefully that is the problem cause if not, I'm selling the brz lol
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Old 11-13-2018, 12:39 PM   #11
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Bad fuel?
No i dont think, ive been using the same gas station for years. The first time this happened was this year.
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Old 11-13-2018, 12:39 PM   #12
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Perhaps try reflashing your tune ?


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Tried multiple times and still happens
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Old 11-13-2018, 12:47 PM   #13
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Thats what i am thinking and hopefully that is the problem cause if not, I'm selling the brz lol
I would say the tell tale sign is if the crackling/popping is coming from under the hood and not exhaust. 2013s did have a known DI seal issue as well.
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Old 11-13-2018, 01:03 PM   #14
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Is this recent? Have you changed the tune on the ECU recently? Does it seem like a rev limiter? If it seems like a rev limiter it probably is a rev limiter. It does sound to me like the OFT launch control or EcuTek FFS.
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