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  1. Problems and Troubleshooting
    1. Are the specs on Denso 3421 (SK20HR11) iridium spark plugs the same as the specs on Honda OEM plugs for the MT 2000 Insight? I had new plugs installed by mechanic and car seems to be misfiring along with MPG now 30-50 (was 50-80mpg). I thought that could be the cause. I believe I have the...