Normally, it runs great. However whenever the weather is +30C/ 86F or hotter it runs like crap and starts to knock.
I know our 91 octane fuel in BC is crap, and Chevrons 94 is worse, but I just peaked at -1509 on my Accessport with the outside air temp at 84F.
The knocking starts at 3000 RPM or so but right as soon as I change gear. I can feel the loss in power immediately with the boost gauge flashing etc. If I stay in the same gear and redline it, it will not knock. It's as if the shift is too harsh and the air/fuel doesn't know what to do, and timing gets pulled.
When the weather is cooler, it runs great. Also drove down to Colorado last August on 91 Octane, in 85+ weather and didn't knock once. American fuel is much better than whatever I'm putting in.
Does this happen to anyone else? I'll attach a datalog if anyone can decipher it..
Thanks in advance