|
|
Content .. 1060 1061 1062 1063 ..
NOTE: A crisp blue spark that is able to jump the gap of the spark tester should be generated. Is good spark present? Yes >> Go To 5 No >> Go To 14 NOTE: Connect the Fuel Injector harness connector before continuing. 5. SPARK PLUG NOTE: Vehicles that are equipped with the 5.7L or 6.1L engines must have both sparks (per cylinder) Remove the Spark Plug. Inspect the Spark Plug for the following conditions. - Cracks - Carbon Tracking - Foreign Material - Gap size out of specifications - Loose or broke electrode NOTE: Lightly tap the bottom of the spark plug on a solid surface. The electrode in the spark plug should Were any of the above conditions present? Yes >> Replace the Spark Plug. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Go To 6 6. FUEL PRESSURE CHECK WARNING: The fuel system is under a constant pressure (even with the engine off). Before testing or ser- Start the engine and observe the fuel pressure reading. NOTE: Fuel pressure specification is 407 KPa +/- 34 KPa (59 psi +/- 5 psi). Choose a conclusion that best matches your fuel pressure reading. Within Specification Go To 7 Below Specification Go To 12 Above Specification Replace the fuel filter/pressure regulator. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 9 - 272 ENGINE ELECTRICAL DIAGNOSTICS LX |