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How do I stop my engine from pinging, in my 1996 Toyota Rav4

I have tried higher octane fuel and or octane boosters. I have as yet been unable to find any way to change the ignition timing, it appears fixed and not changable. No engine check light and the engine runs strong. Just has pinging when under various load and sometimes non load conditions. Thank You

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  • Patrick Nov 21, 2012

    The following appeared to work to limit the pinging. I modified the distributor to change the setting position for either advance or ****** it, then advanced distributor setting. Then I cleared the computer and reset it by disconnecting the battery and reconnecting. The theory was to reset the computer to except the changed timing position. So far the pinging has almost completly disappeared, with only an occasional ping under extreme conditions. Engine runs normal with good power and fuel economy, but without the ping.This procedure appears to have resolved the problm. Thanks.

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