The ignition frequency is the order in which the ignition alternates between cylinders. The spark must occur at the correct time in the combustion cycle, otherwise the engine may be damaged. For this reason, connecting the correct spark plug to the correct distributor terminal is extremely important. To avoid trouble, always replace spark plug wires one at a time.
Cylinder No.1 is closest to the drive belt or the end of the engine pulley. In all Accord and Prelude engines, ignition occurs in the order 1-3-4-2. Distributors from two different manufacturers are used for this: Hitachi and Toyo Denso (often referred to simply as Denso). While the firing order and placement of the spark plug wires is the same for both manufacturers, the distributor caps have different shapes and attachment points; you need to know which distributor you used and purchase the same one when replacing.
An additional aid for correct installation is that for most Honda vehicles the distributor cap is marked with the same numbers as the cylinders, or at least there is one marking for cylinder Number 1. All distributors are numbered clockwise when viewed from above or from the side. side of the cover.