Fuel Injector
WARNING: This page is about a different car, the 1994 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
On 5.2L, disconnect fuel injector connector. Using a DVOM in ohmmeter position, test between pins of injector for resistance. Resistance should be 13.3-15.7 ohms, replace fuel injector as necessary.