For 1990-2009 cars

## Hard Start Petrol

Checks | Action
--- | ---
DEFINITION: The engine cranks OK, but does not start for a long time. The engine does eventually run, or may start but immediately dies.
Preliminary Checks |

• | Refer to Important Preliminary Checks in Symptoms - Engine Controls).

• | Make sure the vehicle operator is using the correct starting procedure.

Fuel System Checks |

• | Test for correct fuel relay operation.

• | Test for correct fuel system pressures. Refer to Fuel System Diagnosis.

Sensor Checks |

• | Test the ECT sensor for correct operation by performing the following:

1. | Allow the engine temperature to reach ambient air temperature by leaving the engine OFF for several hours - overnight for most accurate results.

2. | Turn the ignition ON while leaving the engine OFF.

3. | Using a scan tool compare the ECT and IAT sensors displayed temperature.

The sensors should be within 3°C (5°F) of each other.

4. | Replace the ECT sensor or repair the ECT sensor circuit if the ECT is not near the expected value.

• | Test the TP sensor for correct operation.

| With the throttle blade fully at rest the monitored TP sensor voltage on a scan tool should be LESS than 0.85 volts.

| If the TP sensor is not near the expected voltage check for the following conditions:

- | A faulty TP sensor

- | A faulty TP sensor circuit

- | A sticking throttle shaft or linkage/cable assembly

• | Test for correct operation of the crankshaft position (CKP) sensor.

• | Test for correct operation of the MAP sensor - if equipped.