Hyundai Coupes/Sedans 1986-1993 Repair Guide

Spark Plug Wires



See Figures 1, 2 and 3

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Fig. Fig. 1: Checking plug wire resistance through the distributor cap with an ohmmeter

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Fig. Fig. 2: Checking individual plug wire resistance with a digital ohmmeter

Visually inspect the spark plug cables for burns, cuts, or breaks in the insulation. Check the spark plug boots and the nipples on the distributor cap and coil. Replace any damaged wiring. If no physical damage is obvious, the wires can be checked with an ohmmeter for excessive resistance. Resistance should be about 8,000 ohms per foot of cable length. The resistance reading on the No. 4 wire will be greater than the No. 1 wire because it is slightly longer. When installing a new set of spark plug cables, replace the cables one at a time so there will be no mixup. Start by replacing the longest cable first. Install the boot firmly over the spark plug. Route the wire exactly the same as the original. Insert the nipple into the tower on the distributor cap. Repeat the process for each cable.

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Fig. Fig. 3: Proper routing of the spark plug wires is extremely important on the Elantra, incorrect wire routing will cause ignition system problems