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Discussion Starter #1
Ok, I recently had a VAFC installed on my GS-R and now my VTEC engages while its in neutral. I was wondering if this happens to all of them, or its just an isolated incident. It throws a CEL at the strip unless I set VTEC over my launching RPM. I'm pretty sure this is because the ECU is seeing the VTEC engage at neutral. Thanks for the help.
 

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The V-AFC overrides the ECU for the most part which is why it engages VTEC in neutral when it's not supposed to. Check the CEL code, you may have the V-AFC set more rich/lean than the ECU will allow you to.
 

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Discussion Starter #3
The thing is, it only set it off when VTEC was engaged in neutral. I havent messed with the fuel mixture yet. I've cleared the code and it only came on when I tried to launch in VTEC at the track.
 
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