| Engine cranks, but does not fire |
- Engine breather system disconnected/restricted
- Engine ignition system
- Fuel system
- Electronic engine controls
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| Engine cranks and fires, but will not start |
- Evaporative emissions purge valve
- Fuel pump
- Spark plugs
- HT short to ground (tracking) check rubber boots for cracks/damage
- Ignition coil failure(s)
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- For purge valve tests.
Refer to: Evaporative Emissions
- For fuel system tests.
Refer to: Fuel Tank and Lines
- For spark plug tests, Visually inspect the spark plug for cracks, damage, carbon build up or wet fouling, check the condition of the ground electrode, the center electrode tip and the spark plug HT contact and confirm that the spark plug gap is correctly set using a wire gauge taking care not to cause damage to the center or ground electrode tips. Install new spark plug(s) as required.
- For engine ignition coil circuit tests, check for DTCs and refer to the DTC Index.
refer to: Diagnostic Trouble Code Index - GTDi 2.0L Petrol, DTC: Engine Control Module (ECM)
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| Difficult cold start |
- Engine coolant level-anti-freeze content
- Battery
- Electronic engine controls
- Fuel pump
- Purge valve
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| Difficult hot start |
- Injector leak
- Electronic engine controls
- Purge valve
- Fuel pump
- Engine ignition system
|
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| Difficult to start after hot soak (vehicle standing, engine off, after engine has reached operating temperature) |
- Injector leak
- Electronic engine controls
- Purge valve
- Fuel pump
- Engine ignition system
|
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| Engine stalls soon after start |
- Breather system disconnected/restricted
- Electronic engine control
- Engine ignition system
- Air intake system restricted
- Air leakage
- Fuel lines
|
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| Engine hesitates/poor acceleration |
- Fuel pressure, pump and lines
- Injector leak
- Air leakage
- Electronic engine controls
- Engine ignition system
- Transmission malfunction
- Restricted pedal travel (carpet, etc)
|
|
| Engine backfires |
- Fuel pump and lines
- Air leakage
- Electronic engine controls
- Engine ignition system
- Sticking Variable Camshaft Timing (VCT) hub
|
- For fuel system tests.
Refer to: Fuel Tank and Lines
- Check for leakage in air intake system
- Read DTCs and refer to DTC Index for electronic engine controls.
refer to: Electronic Engine Controls
- Read DTCs and refer to DTC Index in this section for engine ignition system tests
- Read DTCs and refer to DTC Index for VCT tests.
refer to: Electronic Engine Controls
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| Engine surges |
- Fuel pump and lines
- Electronic engine controls
- Engine ignition system
|
|
| Engine detonates/knocks |
- Electronic engine controls
- Fuel pump and lines
- Air leakage
- Sticking VCT hub
|
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| No throttle response |
- Electronic engine controls
|
- Read DTCs and refer to DTC Index for electronic engine control tests
|
| Poor throttle response |
- Breather system disconnected/restricted
- Electronic engine control
- Transmission malfunction
- Traction control event
- Air leakage
|
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| Fuel gauge reading empty with fuel in the fuel tank |
- Active fuel level sensor circuit open circuit
- Passive fuel level sensor circuit open circuit
- Instrument cluster internal failure
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- Using the manufacturer approved diagnostic system, perform the guided diagnostic routine - Fuel Level Sensor Test
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| Fuel gauge not reading empty with no fuel in the fuel tank |
- Jet pump fault
- Fuel crossover tube blocked or leaking
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- Using the manufacturer approved diagnostic system, check datalogger signals -Fuel Level Sensor "pump/active/A" (0xD908) -Fuel Level Sensor "eject/passive/B" (0xD907). Refer to the chart below. If the right sensor reads empty when the left sensor reads more than empty, check that the jet pump is transferring fuel from the left side to the right side
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