Jeep 5149199AA Ignition Coil

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For 2.4L four-cylinder engines, remove the ignition coil unit, clean the outer case, check the coil primary and secondary resistance, and replace if necessary. For 3.7L V6 engines, remove the ignition coil(s), clean the outer case, check the coil primary and secondary resistance, and replace if necessary.

After cleaning the coils, you should inspect each one for cracks, damage, and carbon tracking.

To remove and install the coils, remove the air intake duct and resonator box for the 3.7L V6 and 4.7L V8 engines. For the HEMI engine, remove the air intake duct and resonator box for cylinders 2, 4, 6, or 8. Disconnect the electrical connector, remove the coil mounting bolts, and carefully pull the coil up to disengage the rubber spark plug boots. Inspect the condition of the rubber spark plug boots and replace if necessary. Installation is the reverse of removal.

If you find any damage on the coils, you should replace them.

Follow similar steps but check all eight ignition coils. Clean the outer case, primary terminals, and high-tension terminal for any damage or corrosion. Check the primary resistance and replace the coil if it is not within range. There is no published secondary resistance value, so if the primary resistance is within range but the coil is still causing issues, try swapping it with an adjacent coil. If the misfire DTC follows the coil, it is likely defective.

Start by removing the ignition coil and cleaning the outer case for any damage. Clean the coil primary terminals and check for corrosion. Use an ohm-meter to measure the primary resistance across the two terminals of the connector. Compare the measurement to the specified range and replace the ignition coil if necessary. To check the secondary resistance, connect one ohm-meter lead to the positive terminal of the connector and the other lead to the high-tension terminal at the coil and the spark plug wire terminal. Compare the measurements to the specified range and replace the ignition coil if needed. If the resistance values are within range but the coil is still misfiring or causing trouble codes, try swapping it with an adjacent coil. If the issue persists, consult a professional.

Start by removing the ignition coil unit. Clean the outer case and check for any damage or cracks. Clean the coil primary terminals and remove any corrosion with a wire brush. Next, check the coil primary resistance by connecting the ohmmeter leads to the outer terminals and the center terminal. Repeat this step for each coil. Then, check the coil secondary resistance by connecting one ohmmeter lead to the no. 1 terminal and the other lead to the no. 4 terminal. Repeat this step for each coil. Compare the measurements to the specified resistance values and replace the ignition coil unit if necessary. To replace the coil, remove the air filter housing and outlet hose. Mark the spark plug wires for proper firing order and remove them from the ignition coil. Disconnect the electrical connector and remove the coil pack mounting bolts. Finally, remove the coil from the engine compartment and install the new coil in reverse order.

Start by removing the ignition coil and cleaning the outer case for any damage. Clean the coil primary terminals and check for corrosion on the coil tower terminal, cleaning it with a wire brush if necessary. Use an ohmmeter to measure the coil primary resistance by attaching the leads to the two terminals of the connector. Compare the measured resistance to the specified range and replace the ignition coil if it falls outside the range. To check the coil secondary resistance, connect one ohmmeter lead to the positive terminal of the connector and the other lead to the high-tension terminal. Compare the measured resistance to the specified range and replace the ignition coil if necessary. If the primary and secondary resistance values are within specification but the coil is still misfiring or causing trouble codes, try swapping it with an adjacent coil. If the issue persists, consult a professional for further testing.

Follow similar steps but note that for HEMI engines, it may be easier to check certain coils on the bench. Clean the outer case and terminals, measure the primary resistance, and swap coils if necessary. For replacement, remove the necessary components, disconnect the electrical connector, and remove the ignition coil. Install the new coil by reversing the removal steps.