Quote from: 91hybrid on March 17, 2015, 06:53:28 PM
Marbles sounding... sounds like detonation under part throttle load. I haven't looked at the log but if it detonates even with a stock tune, there would be some issues that need resolved.
I'll see what the log says...
John
From you log, I don't see anything out of place other than the fact that for whatever reason, you are only able to flow enough fuel to support about 200kpa of boost. If it goes over 200 your car is loosing HPFP rail pressure and you can see the car leaning out from 11.76 to 12.3. I don't see any issues with knock so there may be room to turn your timing up. However, the marble noise worries me as under part throttle low load, maybe inadequate fuel flow is causing it to have less than ideal fuel ratio which makes it more prevalent to detonate.
Of course this is all diagnosis via internet and there could be other "levers" at play causing the issue.
I would be investigating the LPFP in your car. Maybe the filter, may be the pump. I have not heard of any folks having issues with the HPFP but maybe it has issues as well. I am not sure how you could distinguish between each one.
Can you log the LPFP pressure too? I have never tried, if so you can see if it is dropping off before the HPFP pressure drops off.
John