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Home >> Jeep >> 2005 >> Wrangler Rubicon, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 488 (Powertrain Diagnostic Procedures - Gas) >> Diagnostic Information And Procedures >> DRIVEABILITY - NGC - Diagnostic Tests >> P0300-Multiple Cylinder Misfire; P0301-Cylinder No. 1 Misfire; P0302-Cylinder No. 2 Misfire; P0303-Cylinder No. 3 Misfire; P0304-Cylinder No. 4 Misfire; P0305-Cylinder No. 5 Misfire; P0306-Cylinder No. 6 Misfire >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.

INTERMITTENT MISFIRE

VISUAL INSPECTION

(A142), (F142) ASD RELAY OUTPUT CIRCUIT

ENGINE MECHANICAL PROBLEM

IGNITION COIL

COIL CONTROL CIRCUIT

SPARK PLUG

CHECKING FUEL PRESSURE

FUEL PUMP INLET STRAINER PLUGGED

RESTRICTED FUEL SUPPLY LINE

FUEL PUMP MODULE

CHECKING FUEL LEAK DOWN

FUEL INJECTOR

INJECTOR CONTROL CIRCUIT

PCM

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