Mopar 56029129AA Ignition Coil

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The first step is to dampen a cloth and use it to clean the coils.

Try swapping it with an adjacent coil.

Remove the engine cover and disconnect the electrical connector and spark plug wire boot for the companion cylinder. Remove the coil mounting bolts and carefully pull up with a twisting motion to disengage the rubber spark plug boots. Inspect the condition of the rubber spark plug boot and replace if necessary.

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.

The first step is to dampen a cloth and use it to clean the coils.

You should clean the coils with a dampened cloth and make sure to dry them thoroughly.

When inspecting the coils, one should check for cracks, damage, and carbon tracking.

Remove the engine cover and disconnect the electrical connector and spark plug wire boot for the companion cylinder. Remove the coil mounting bolts and carefully pull up with a twisting motion to disengage the rubber spark plug boots. Inspect the condition of the rubber spark plug boot and replace if necessary.

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.