| All engine related issues |
Engine system fault |
- Using the manufacturer approved diagnostic system, check the engine control module for related DTCs and refer to the relevant DTC index
|
| Engine difficult to start (cold/warm hot engine) |
Spark plugs fouled/worn Cylinder compression(s) low |
- Check the spark plugs for cracks, damage, carbon build up, wet fouling, electrode gap too large/small, center electrode condition, ground electrode condition
- Perform the Inline diagnostic unit 2, relative compression test - GTDI 2.0L Petrol
- GO to PINPOINT TEST B .
|
| Engine idle poor |
- Intake system leaking
- Spark plugs fouled/worn
- Cylinder compression(s) low
- Catalytic converter blocked
- Exhaust system blocked
- Engine fault
|
- Check the intake system for leaks
- Check the spark plugs for cracks, damage, carbon build up, wet fouling, electrode gap too large/small, center electrode condition, ground electrode condition
- Perform the Inline diagnostic unit 2, relative compression test - GTDi 2.0L Petrol
- GO to PINPOINT TEST B .
- Check the catalytic converter for blockages
- Check the exhaust system for blockages
- Refer to the Intake Manifold Vacuum Test (below)
|
| Engine performance insufficient or cylinder compression(s) insufficient |
- Intake system leaking
- Spark plugs fouled/worn
- Cylinder compression(s) low
- Catalytic converter blocked
- Exhaust system blocked
- Fuel trim values excessively high
- Engine fault
|
- Check the intake system for leaks
- Check the spark plugs for cracks, damage, carbon build up, wet fouling, electrode gap too large/small, center electrode condition, ground electrode condition
- Perform the Inline diagnostic unit 2, relative compression test - GTDi 2.0L Petrol
- GO to PINPOINT TEST B .
- Check the catalytic converter for blockages
- Check the exhaust system for blockages
- Using the manufacturer approved diagnostic system, check datalogger signals - Short Term Fuel Trim - Long Term Fuel Trim
- Positive readings of between 10-20%: check for air leaks in air intake system
- Negative readings of between 10-20%: check for over fuelling e.g. leaking injectors, high fuel pressure
- Readings above 20%: check for DTCs and refer to the relevant DTC Index.
- Refer to the Intake Manifold Vacuum Test (below)
|
| Engine oil consumption excessive |
- Engine oil leak(s)
- Engine breathing system blocked
- Cylinder compression(s) low
- Engine wear
|
- GO to PINPOINT TEST A .
- Check the integrity of the engine breathing system
- GO to PINPOINT TEST B .
- Perform the Inline diagnostic unit 2, relative compression test - GTDi 2.0L Petrol
- Refer to the Oil Consumption Test (below)
|
| Engine noise excessive |
- Intake system leaking
- Balance shaft gear failure
|
- Check the intake system for leaks
- Check the engine noise (compare to another vehicle for reference). If the noise is excessive, check the integrity of the engine balance assembly
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