| Condition | Possible Cause | Action |
|---|---|---|
|
Excessive hydrocarbon (HC) emission or Excessive carbon monoxide (CO) emission
|
Faulty ignition coil
|
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Fuel pressure out of specification
|
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|
Lead contamination of three way catalytic converter
|
Check for absence of filler neck restrictor.
|
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Malfunctioning PCV system
|
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Faulty EVAP control system
|
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|
Closed loop system (A/F feed back compensation) fails
– Faulty TP sensor
– Faulty ECT sensor or MAP sensor
– Faulty oxygen sensor
|
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Faulty injector
|
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|
Faulty ECM
|
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|
Low compression
|