Fault-Tracing Information

Condition(s)
- no diagnostic trouble codes (DTCs) stored.
- engine at normal operating temperature.

Possible source(s)
- defective spark plugs.
- blocked/leaking injectors.
- uneven compression.
- faulty sensor signals.
- moisture in spark plug wells.
- incorrectly adjusted camshafts.
- Start fault-tracing. Proceed to: Checking Blocked Injectors.