P0303

Tests 266 - 272:

Tests 273 - 277:

Tests 278 - 280:

SYMPTOM LIST
P-0303 CYLINDER #3 MIS-FIRE

TEST NOTE:
All symptoms listed above are diagnosed using the same tests. The title for the tests will be P-0300 MULTIPLE CYLINDER MIS-FIRE.

WHEN MONITORED
With the engine running, after successfully performing a crank sensor learn.

SET CONDITION
When more than 2 percent misfire rate is measured during two trips, or with a 10 percent to 30 percent misfire rate during one trip.

POSSIBLE CAUSES
- Other possible causes for mis-fire
- CAM, crank, valve timing, or vacuum problem
- Electronic ignition coil output low
- Engine mechanical problem
- Secondary ignition pattern irregular
- Fuel contamination
- Fuel pressure leak down out of specification
- Fuel pump amperage out of specification
- Fuel pump capacity out of specification
- Fuel pump pressure out of specification
- Mis-fire does not reoccur