Hard Start / Long Crank / Erratic Start / Erratic Crank

PINPOINT TEST 2 HARD START, LONG CRANK, ERRATIC START AND ERRATIC CRANK DESCRIPTION

PINPOINT TEST 2	HARD START / LONG CRANK / ERRATIC START / ERRATIC CRANK
DESCRIPTION	Starter cranks engine at normal speed but engine requires excessive cranking time before start Battery in normal condition

PINPOINT TEST 2 HARD START, LONG CRANK, ERRATIC START AND ERRATIC CRANK INSPECTION & ACTION

PINPOINT TEST 2		HARD START / LONG CRANK / ERRATIC START / ERRATIC CRANK
STEP	INSPECTION		ACTION
1	PRELIMINARY CHECKS NOTE: Confirm that the correct starting procedure was used by the customer before proceeding with diagnosis. Perform the following preliminary checks: Vacuum leaks Fuel quality (concerns such as proper octane, contamination, winter/summer blend) Intake air system (tubes) Air cleaner (restrictions) Battery condition and starter current draw Are all checks OK?	Yes	Go to next step.
1		No	Repair as necessary. Verify symptom no longer exists.
2	PERFORM PCM QUICK TEST Are any DTCs displayed during continuous memory, key on engine off (KOEO) or key on engine running (KOER) self-tests?	Yes	Check for cause. See DIAGNOSTIC TROUBLE CODE (DTC) INDEX - POWERTRAIN CONTROL MODULE (PCM) .
2		No	Go to next step.
3	CHECK SECONDARY IGNITION SYSTEM Remove the fuel pump fuse. Is a strong blue spark visible at each disconnected high-tension lead while cranking engine?	Yes	Go to next step.
3		No	Check camshaft position (CMP) sensor signal at powertrain control module (PCM). See CAMSHAFT POSITION (CMP) SENSOR MALFUNCTION . If CMP sensor is OK, check following: Crankshaft position (CKP) sensor. See GENERAL PINPOINT TEST 8: CRANKSHAFT POSITION (CKP) SENSOR . High tension leads. Spark plugs. Go to inspection procedure See SPARK PLUG REMOVAL / INSTALLATION . If CMP sensor is not OK, replace. See CAMSHAFT POSITION (CMP) SENSOR REMOVAL / INSTALLATION - 2.3L for 2.3L engine. See CAMSHAFT POSITION (CMP) SENSOR REMOVAL / INSTALLATION - 3.0L for 3.0L and 4.0L engines.
4	CHECK FUEL DELIVERY SYSTEM Perform fuel pressure inspection. See PINPOINT TEST 10: FUEL LINE PRESSURE/FUEL PRESSURE HOLD INSPECTION . Fuel line pressure: for 3.0L/4.0L 207-448 kPa (30-65 psi) for 2.3L 240-380 kPa (35-55 psi) Is fuel pressure correct?	Yes	Go to next step.
4		No	If pressure is greater than 448 kPa (65 psi) for the 3.0L/4.0L, 380 kPa (55 psi) for the 2.3L: replace fuel pump. See FUEL PUMP REMOVAL / INSTALLATION . If pressure is less than 207 kPa (30 psi) for the 3.0L/4.0L, 240 kPa (35 psi) for the 2.3L: check fuel supply line for restriction.
5	CHECK FUEL DELIVERY SYSTEM Check fuel pump fuel flow. See GENERAL PINPOINT TEST 5: FUEL DELIVERY SYSTEM . Does fuel system flow the required amount of fuel?	Yes	Check injector for leakage. See GENERAL PINPOINT TEST 11: FUEL INJECTOR INSPECTION . Replace any leaking injectors. Go to step 12. If injector OK, Go to step 6.
5		No	Check fuel supply line for restriction.
6	CHECK EXHAUST SYSTEM Check exhaust system. See ENGINE COMPONENT TEST . See vacuum test. Is there a restriction in the exhaust system?	Yes	Service as necessary.
6		No	Go to next step.
7	IS ENGINE OVERHEATING (HOT START CONCERN ONLY)? For hot start concerns, does engine appear to be overheating?	Yes	See SYMPTOM TROUBLESHOOTING CHART - ENGINE COOLING .
7		No	Go to next step.
8	CHECK PCV SYSTEM Remove positive crankcase ventilation (PCV) valve and shake it. Does PCV valve rattle?	Yes	Go to next step.
8		No	Replace PCV valve. See GENERAL PINPOINT TEST 11: FUEL INJECTOR INSPECTION .
9	CHECK EVAP SYSTEM Start engine and bring to normal operating temperature. Disconnect crankcase ventilation hose. Place a stiff piece of paper over the hose end. Does vacuum hold the paper?	Yes	Go to next step.
9		No	Check evaporative emission system as follows: Disconnect evaporative hose and place a stiff piece of paper over the hose. Does vacuum hold paper? If yes, go to DTC P0455. See EVAPORATIVE EMISSION (EVAP) SYSTEM MALFUNCTION . If no, check for vacuum leak in PCV system, oil cap, PCV valve, rocker cover for bolt/torque/gasket leak.
10	CHECK INTAKE AIR SYSTEM Check for contaminated mass air flow (MAF) sensor. Is there any contamination?	Yes	Replace MAF sensor. See MASS AIR FLOW/INTAKE AIR TEMPERATURE (MAF/IAT) SENSOR REMOVAL / INSTALLATION .
10		No	Go to next step.
11	CHECK STARTING SYSTEM See SYMPTOM TROUBLESHOOTING CHART - STARTING SYSTEM . Is starting system normal?	Yes	Go to next step.
11		No	Service as required.
12	Verify test results. If OK, see SYMPTOM TROUBLESHOOTING CHART - ENGINE DRIVEABILITY to service any additional symptoms.