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I just learned about the EGR valve (Exhaust Gas Recirculation) and the problem that a malfunctioning one causes.. reduced power, detonation,(pinging), rough idle, stalling, hesitation when accelerating... i have minor cases of some of those.. Has anyone ever seen a DIY for a 94 honda civic ex manual tranny?? or do you knoww where it is.. anything would help.. thanks in advace.