Quote:
Originally Posted by Mov Ov3r
My first thought was this as well because I did fill it up that morning (Exxon), premium is all the vehicle has seen, 93 only. It could most certainly be something as simple as bad gas, but would bad gas be enough to trip the knock sensor where the computer could not fix timing?
I was also thinking maybe injector or spark plug? my thought was this would be very uncommon at 12K miles, but that's not to say it's not the problem. If it was you would expect the check engine light to stay lit, or at least I would.
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I think the knock sensor has to detect knock several times before you see a CEL. You did pull the code, so I assumed the light stayed lit for the ride home and then you cleared the DTC.
I would maybe check fuel trims for the affected cylinders. Could be running slightly lean there, and that manifests as knock at WOT. Fuel injector problem or small vacuum leak are possibilities.