Nissan 240SX/Altima 1993-1998 Repair Guide

FIRING ORDERS

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See Figures 1 and 2

To avoid confusion, label and remove the spark plug wires one at a time, for replacement.



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Fig. Fig. 1: 2.4L Engine Engine Firing Order: 1-3-4-2 Distributor Rotation: Counterclockwise



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Fig. Fig. 2: Cylinders are numbered 1-4, starting at the accessory drive belt end of the engine

If a distributor is not keyed for installation with only one orientation, it could have been removed previously and rewired. The resultant wiring would hold the correct firing order, but could change the relative placement of the plug towers in relation to the engine. For this reason, it is imperative that you label all wires before disconnecting any of them. Also, before removal, compare the current wiring with the accompanying illustrations. If the current wiring does not match, make notes to reflect how your engine is wired.

 
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