2001 Toyota Corolla Engine Knock when accelerate

2001 TOYOTA COROLLA
138,000 MILES • 4 CYL • 2WD • AUTOMATIC
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PIOJO
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The noise I’m experiencing is when the engine goes above 2.000 RPM and the throttle position is almost at 50% or more, when the gas is depressed the noise goes away, for example this type of noise is exactly the same when you use a low octane gas on an engine that requires premium.
I have replaced the two O2 sensors and the check engine light still on, I went to AutoZone to get another diagnose and gives a huge list of all the sensors to check. At this point I don’t what to do I’m not sure if this is a timing issue. I appreciate your help. Thanks
Apr 1, 2010 at 7:23 PM
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MMPRINCE4000
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It is most likely a timing issue (crank/cam sensor), or VVTI.

You would have to read timing in live data mode to confirm.
Apr 2, 2010 at 8:51 AM