I recently recieved a '93 Civic Cx (gas prices suck) with a bad head gasket. Naturally, I ripped it apart to put in a new head gasket (OEM parts only) and decided that while I was at it I would replace the Ex. and In. manifold gaskets, valve cover gasket, timing belt and water pump. Prior to putting it all back together, I took the head to a machine shop like a good boy would. Anyway, upon intial start-up the engine struggled to turn over and back-fired. This is when I realized for the 10th time that the plug wire diagram in Helm's '84-'91 manual is backwords (Be warned!).