See Figures 1 and 2
Coil one fires cylinders 1 and 4; coil two fires cylinders 2 and 3. Each coil tower is labeled with the number of the corresponding cylinder.
- Unplug the ignition cables from the coil terminals and the spark plugs. Make certain to label them before removal. Measure the resistance of the cables. Resistance must be between 3,000-12,000 ohms per ft. (30.5 cm) of cable. Replace any cable not within tolerance.
- Unplug the electrical wiring harness connector from the coil pack.
- Measure the primary resistance of each coil. At the coil, connect an ohmmeter between the B+ pin and the pin corresponding to the cylinders in question. Resistance on the primary side of each coil should be 0.5-0.7 ohms. Replace the coil with a new one if the resistance is not within tolerance.
- Remove the ignition cables from the secondary towers of the coil. Measure the secondary resistance of the coil between the towers of each individual coil. Resistance should be 11,600-15,800 ohms. If the coils' resistances are not within specifications, the coils must be replaced.
REMOVAL & INSTALLATION
- Disconnect the negative (-) battery cable.
- Unplug and label the spark plug cables from the coil pack.
- Detach the electrical wiring harness connector from the coil pack.
- Loosen and remove the coil mounting screws.
- Remove the ignition coil from the engine.
- Set the ignition coil back in place and secure with the mounting screws. The mounting screws should be tightened to 9 ft. lbs. (12 Nm).
- Plug the electrical wiring harness connector back into the coil pack.
- Attach the spark plug cables to the ignition pack, making certain the cables are attached to the correct coil towers.
- Connect the negative battery cable.