Quick checklist
Swap ignition coil with another cylinder to test if problem follows coil
OBD2 Codes
P0303 – Cylinder 3 Misfire Detected
Cylinder 3 is misfiring; check spark plug coil and injector.
Details
Specific cylinder misfire. Swap coil with another cylinder to test if problem follows the coil.
Typical causesBad spark plug failed ignition coil clogged fuel injector weak compression
SymptomsRough idle loss of power check engine light flashing
SeverityHigh — can damage catalytic converter
DIY checksSwap ignition coil with another cylinder to test if problem follows coil
ToolsSpark plug tester coil tester compression tester
Utilities
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FAQ
Common questions
Can I drive with a misfire?
Not recommended—unburned fuel can damage the catalytic converter.
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Discussion & Experiences
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