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How to Check the Firing Order on a 93 Civic

There is a conductive metal rotor that spins inside the distributor cap of your 1993 Honda Civic. An electrical current feeds through the spinning rotor that contacts four separate posts inside the cap sending the current through the posts. The posts are attached to ignition wires which carry the current to the spark plugs. Each post is contacted at different times creating a firing order. If the firing order is off the engine will run poorly or not run at all. Check the firing order of your 1993 Honda Civic whenever a routine tune-up is performed.

Instructions

1

Open the hood of your civic to locate the distributor cap. The distributor is a small plastic cap with five large ignition wires coming out of the top. The distributor is installed on the passenger side of the engine block. The cap is installed horizontally and points toward the passenger side.

2

Walk to the passenger side of the car and look at the distributor cap face. There are four ignition wires installed around the edges of the cap face at approximately 2:30, 4:30, 7:30 and 10:30 as if on a clock. Take a piece of paper and pencil and draw a simple diagram. Label the wire installed at 2:30 as number four. Label the wire installed at 4:30 as number two, 7:30 as number one, and 10:30 as number three. The fifth wire installed in the center of the cap is irrelevant.

3

Follow the four ignition wires to their other end. This is where the wires connect with the spark plugs on the engine block. Stand in front of the vehicle. Draw a separate diagram labeling the spark plugs in descending order from left to right. The left most spark plug, closest to the distributor cap is number four. The spark plug to the right of that is number three and then number two. The spark plug to the far right is number one.

4

Use the two diagrams to make sure the ignition wires connect the terminals on the distributor cap with the corresponding spark plugs. The ignition wire connecting the number one distributor terminal and spark plug should be the longest wire in length. Wire number two should be the second longest with number four being the shortest wire.

5

Start the engine to test the firing order. If installed properly, the engine should run smoothly and evenly, without skipping a cylinder. Turn off the engine immediately and re-examine the installation if the engine runs choppy.