Misfire detected shortly after engine start.
SYMPTOMS
- Check-engine light
- Rough start
- Stumble on cold start
LIKELY CAUSES
- Worn plugs or coils
- Low fuel pressure at start
- Vacuum leak
- Injector fault
DIAGNOSIS STEPS
- Read misfire counters per cylinder
- Inspect plugs and coils
- Check start fuel pressure
- Smoke-test for vacuum leaks
RELATED PARTS
- Spark plugs
- Ignition coils