Direct Ignition System: Spark
WARNING: This page is about a different car, the 2003 Jeep Wrangler, 2003 Jeep Liberty, and 2003 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
For the 2.4L Wrangler and 2.4L Liberty, check for spark at coil wire (if applicable) and at each spark plug wire using a high output spark tester. Check spark plug wire resistance on suspect wires. Resistance should be no greater than 12 k/ohms per foot and no less than 3 k/ohms per foot.