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[Pavel Olavich]

Originally Posted by marcus

i find the yaris timing is right on the border of you being able to use 87 octane. slight change of slopes and temp even with its ecu adjusting..gives you a sluggish feel...89 got better outcome..its could also be just my car.. "Dont you guys notice a whirring sound when you accelerate , try driving beside a wall" i need to know if this is normal. or a slight knockin on the engine?

I know the sound you're talking about....my old '97 Camry did the same...that sound is NOT pinging...it is just the fuel injectors doing their thing....yea, my Yaris does the same thing when I drive near a wall....again, not pinging, just valve and injector noise....no worries.