If there is that much detonation occuring. There is engine damage happening. Run it on premium until you get it diagnosed and repaired.If it hasn"t happened already. There is going to be broken piston rings or broken piston ring lands. I agree it sounds like a plugged EGR but the OBDII should have thrown a check engine code with a no flow EGR. As previously stated the knock sensor has also either failed or the wire/connector is disconnected. Even with a plugged EGR. The ECM should be receiving a knock signal and retarding the timing until the engine is a gutless no knock pig. If the wrong plugs have been installed. The engine can almost get knocking along like a glowplug model airplane engine.
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Today's Featured Article - George's Fordson Major - by Anthony West (UK). This is a bit of a technical info to add on to the article about George's Major in the "A Towny Goes Plowing" article. George bought his Major from a an implement sale about 18 years ago for £200.00. There is no known history regarding its origins or what service it had done, but the following work was undertaken by Harold alone to bring it up to show standard. From the engine number, it was found that the major was produced late 19
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