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Ignition System: Testing and Inspection
DEFINITION: Engine cranks fine but does not start immediately.Check normal Scan tool readings of:
^ Engine Coolant Temperature (ECT) sensor
^ Manifold Absolute Pressure (MAP) sensor
^ Throttle Position (TP) sensor
^ Intake Air Temperature (IAT) sensor
Check:
^ Fuel system and fuel quality
^ Idle Air Control (IAC) valve carboned up
^ Acting wires
^ Engine mechanical problems (e.g., low compression, sticking lifters, worn valve train)
^ Carbon deposits in intake manifold
^ Worn spark plugs