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Fuel system Harness Crankshaft position (CKP) sensor ECM fault
section. Check the fuel pressure, Fuel Tank and Lines - 4.2L NA V8 - AJV8/4.2L SC V8 - AJV8/3.0L NA V6 - AJ27/3.5L NA V8 - AJV8, VIN Range: G45704->G99999 For CKP tests, Electronic Engine Controls - VIN Range: G45704->G99999 Refer to the warranty policy and procedures manual if an ECM is suspect.
Engine cranks and fires, but will not start
Evaporative emissions purge valve Fuel pump Spark plugs HT short to ground (tracking) check rubber Ignition coil failure(s) Harness
For purge valve tests, Evaporative Emissions - VIN Range: G45704->G99999 Check the fuel pressure, Fuel Tank and Lines - 4.2L NA V8 - AJV8/4.2L SC V8 - AJV8/3.0L NA V6 - AJ27/3.5L NA V8 - AJV8, VIN Range: G45704->G99999 For spark plug tests, GO to Pinpoint Test G531326p2. For ignition coil circuit tests, GO to Pinpoint Test G531326p1.
Difficult to start cold
Coolant anti-freeze content Battery CKP sensor Exhaust gas recirculation (EGR) valve stuck open Fuel pump Purge valve
Check the anti-freeze content. For battery information, Battery For CKP sensor tests, Electronic Engine Controls - VIN Range: G45704->G99999 For EGR valve tests, Engine Emission Control - VIN Range: G45704->G99999 Check the fuel pressure, Fuel Tank and Lines - 4.2L NA V8 - AJV8/4.2L SC V8 - AJV8/3.0L NA V6 - AJ27/3.5L NA V8 - AJV8, VIN Range: G45704->G99999 For purge valve tests, Evaporative Emissions - VIN Range: G45704->G99999
Difficult to start hot
Injector leak Engine fuel temperature (EFT) sensor Intake air temperature (IAT) For fuel injectors, Fuel Injectors (18.10.02) For EFT, IAT and MAF sensor tests, Electronic Engine Controls - VIN Range: G45704->G99999 For purge valve tests, Evaporative Emissions - VIN Range: |