Failure to route the cables properly could cause the radio to reproduce ignition noise, cross ignition of the spark plugs or short circuit the cables to ground.
NOTE: REMOVE cables from coil first before removing spark plug insulator.
Special care should be used when installing spark plugs in the 2.4L cylinder head spark plug wells. Be sure the plugs do not drop into the wells, damage to the electrodes can occur.
Always tighten spark plugs to the specified torque. Over tightening can cause distortion resulting in a change in the spark plug gap. Overtightening can also damage the cylinder head.
Remove the air cleaner lid, disconnect the inlet air sensor and makeup air hose.
Disconnect the negative battery cable.
Remove the upper intake manifold,
Disconnect the cable from the ignition coil first.
Always remove the spark plug cable by grasping the top of the spark plug insulator, rotate the boot 90 and pulling straight up in a steady motion.
Remove the spark plug using a quality socket with a rubber or foam insert.