Hard Start: Sensor/System

Check for an Engine Coolant Temperature (ECT) sensor that has shifted in value. Go to TEMPERATURE VS. RESISTANCE table.
Check for proper operation of the Manifold Absolute Pressure (MAP) sensor. Go to DTC P0105: MANIFOLD ABSOLUTE PRESSURE SENSOR under DIAGNOSTIC TESTS in SELF-DIAGNOSTICS - 2.2L ALERO, CAVALIER, GRAND AM & SUNFIRE - GASOLINE article. If no, system is okay at this time.
Check for proper operation of the Throttle Position (TP) sensor. Go to DTC P0105: MANIFOLD ABSOLUTE PRESSURE SENSOR under DIAGNOSTIC TESTS in SELF-DIAGNOSTICS - 2.2L ALERO, CAVALIER, GRAND AM & SUNFIRE - GASOLINE article. If no, system is okay at this time.
Test for proper operation of the Intake Air Control (IAC) valve. Go to IDLE AIR CONTROL SYSTEM under IDLE CONTROL SYSTEMS in SYSTEM & COMPONENT TESTING - 2.2L ALERO, CAVALIER, GRAND AM & SUNFIRE article.