without a properly functioning egr valve your car has to retard the ignition to prevent octane knock. When working correctly, it also reduces emmisions.
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RIP Maxima 1997-2012
Quote:
Originally Posted by jamesqf
I think you missed the point I was trying to make, which is that it's not rational to do either speed or fuel economy mods for economic reasons. You do it as a form of recreation, for the fun and for the challenge.
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