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So I have started to face this issue of sluggish/slow acceleration with my 2ZZ-GE AE80, I changed the fuel pump, spark plugs, cleaned lift solenoid but same issue persisted. I went from 97RON to 92RON fuel for some reason and all of a sudden the car does not hesitate during acceleration, what can be the problem. Car used to have popping sound from exhaust before there was this issue.

Note: Water temp goes to 101ish and 2zz knocks due to 92RON while it never knocks or temperature never goes above 100C on 97 RON.

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