Fuel Injector
Disconnect fuel injector harness connectors. Using a DVOM, measure resistance between injector terminals. See Fig 1. If resistance of any injector is not as specified, replace injector. If injector resistance is within specification, injector is okay. For additional fuel injector testing and specifications, see TEST HD: MISFIRE DETECTION MONITOR under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.