3sge (3rd gen) Octane? Options

[czwalga]

3rd gen 3sge does anyone know the recommended octane? Or most likely RON since it's not a US engine? I've been bashing my brains in trying to figure out this problem and refuse to go to another race with it. After about 30 hard miles 5k RPM.... the engine starts cutting out lower and lower in the RPM range until I cant rev over 4k RPMS.

I've been running 87 octane, i'm thinking the knock sensor could be detecting something and slowly pulling timing.




If this is the case i'm an idiot, and created a lot of headache for a stupid easy fix.... just sucks cause there's no easy way to test it.

This post has been edited by czwalga: Jan 31, 2013 - 8:10 AM

[Special_Edy]

You need to get the engine to manifest the problems and then try to diagnose it while it is still acting up. I would conjecture that it could be the ignition coil, I've seen this exact symptom before. Maybe too hot of a plug could cause this. Test the primary/secondary resistance on that coil with a multimeter, just for ****s and giggles.
Its unfortunate the japanese don't have OBD2, there is so much you can do just by reading the realtime data out of the ECU

This post has been edited by Special_Edy: Feb 3, 2013 - 12:31 PM

[czwalga]

You need to get the engine to manifest the problems and then try to diagnose it while it is still acting up. I would conjecture that it could be the ignition coil, I've seen this exact symptom before. Maybe too hot of a plug could cause this. Test the primary/secondary resistance on that coil with a multimeter, just for ****s and giggles.
Its unfortunate the japanese don't have OBD2, there is so much you can do just by reading the realtime data out of the ECU

Entire ignition system was already replaced.