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P0302-CYLINDER #2 MISFIRE (CONTINUED) 4. IGNITION SYSTEM OPERATION Turn the ignition off. Connect the Ignition Coil harness connector. Remove the Ignition Coil. Leave the Fuel Injector harness connector of the cylinder being tested disconnected. Install a spark tester on the Ignition Coil. While cranking the engine observe the spark coming from the spark tester. 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 Turn the ignition off. 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 - 1734 ENGINE - ELECTRICAL DIAGNOSTICS - SRT-10 DR/DH |