Diagnostic Aids
WARNING: This page is about a different car, the 2002 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
If a short to voltage on control circuit or a shorted fuel injector exists when fuel injector is commanded on, ECM will open driver circuit for protection and current draw will be low.
Fuel in the oil is a good indication of a leaking or grounded injector.
To locate an intermittent problem, start engine and use scan tool to monitor MISFIRE CURRENT CYL. of affected cylinder. If a fuel injector fault exists, a misfire will occur on affected cylinder and misfire counter will count up.
Fuel injector resistance should be 12-13 ohms at 74°F (23°C).