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S300 rev limiter issue v2
Posted: Wed May 14, 2025 7:49 am
by vdgmarc
Hi all, on a hillclimb Civic with B16B with S300, I have strange sporadic issues. Sometimes the rev limiter switches to on for an unknown reason. The rest of the time, everything ok.
Looking in the logging coupled with the mapping, I don't see any reason for this.
Any idea? Mapping and logging attached.
Thanks
Re: S300 rev limiter issue v2
Posted: Wed May 14, 2025 9:12 am
by Spunkster
When did the problem start and what has changed on the vehicle since it was last working correctly.
Re: S300 rev limiter issue v2
Posted: Thu May 15, 2025 9:20 am
by vdgmarc
It's there since the beginning of the engine.
Re: S300 rev limiter issue v2
Posted: Thu May 15, 2025 9:21 am
by vdgmarc
Beginning of the engine was early '24.
Re: S300 rev limiter issue v2
Posted: Fri May 16, 2025 10:37 am
by Spunkster
If it is sporadic, then it may just be a wiring related issue. Try the ECU on a known working vehicle and see if it works correctly.
Re: S300 rev limiter issue v2
Posted: Tue May 20, 2025 7:15 am
by vdgmarc
I thought to that as well, but in the logfile, you can see that it is a command by the ECU. Meaning that it's not a misfire, unfortunately.
Re: S300 rev limiter issue v2
Posted: Tue May 20, 2025 9:10 am
by Spunkster
You should still try this in a known working vehicle.