Chrysler 56029129AB Ignition Coil

First of all, wipe the coils good with a dampened cloth and dry them thoroughly. Next, check each coil for any cracks, damage, and carbon tracking. Then, make sure the coil is put into place securely onto the spark plug(s). Replace the coil if damaged.

A coil in 2006 and later models should be replaced by swapping it with an adjacent coil when it fails to fire or causes a misfire which triggers the Powertrain Control Module to set Diagnostic Trouble Code (DTC) searching for misfire. A defective coil that caused a Diagnostic Trouble Code on one cylinder will probably trigger the same code when used above another cylinder indicating the coil is most likely faulty since two adjacent coils would have to fail simultaneously. Seek help from a professional service department at a dealer location or qualified automotive workshop in case you have any doubts about coil replacement. The coil replacement begins by taking off the engine cover before removing the electrical connector from the ignition coil. The coil should ride up while removing its two bolts then releasing the rubber spark plug boots from their plugs through twisting movements. Examine the rubber spark plug boots for damage after removing the coil because damaged boots should be replaced. The process of putting equipment in place runs directly opposite to the steps taken for removal.

To check the 3.7L V6 and 4.7L V8 engines' ignition coils, begin by removing the coil and cleaning the outer case. For the HEMI engine, clean the outer case, primary terminals, and high-tension terminal. Check the primary resistance and replace it if not within range. To replace, remove the air intake duct, resonator box, and disconnect the electrical connector, remove the coil mounting bolts. To reinstall, switch the removal steps going from the final step to the beginning step.

To check the 3.7L V6 and 4.7L V8 engines, 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. For the 3.6L V6 and HEMI engines, 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.

To check the 3.7L V6 and 4.7L V8 engines, 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. For the 3.6L V6 and HEMI engines, 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.