| It takes soo much knock for the ECM to start retarding timing, but it does not retard all timing at once. It retards timing depending on severaity of knock. All of this is inaudible. Yes, my car does have a factory knock sensor. Not trying to flame you or anything. I love your site and I love the whole idea behind all of the "gauges" you've got!! thanx......
76 280Z 89 Sunbird GT Turbo 02 Accent GS 
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