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P0303 Cylinder 3 Misfire Diagnosis - 2008 Nissan Altima

Model: Nissan Altima 2008 Fault Code: P0303 Posted: 2016-10-06 00:44

I'm experiencing a misfire in cylinder 3, indicated by the P0303 diagnostic code on my 2008 Nissan Altima. I've already replaced both the spark plugs and the coil pack, but the issue persists. Should I consider replacing the fuel injector? What specific tests can I perform to determine if it's clogged? I'm familiar with electrical testing procedures such as checking for spark at the #3 plug.

Related fault codes
P0303
Comments (1)
Anonymous 2016-10-06 09:54

Is P0303 the only diagnostic code present? A misfire in cylinder 3 could be caused by: - SPARK: Check if there is actual spark at the #3 plug. - FUEL: Verify that the #3 fuel injector is pulsing — use a noid light for this test. Additionally, inspect the plug condition; is it wet or blackened? - MECHANICAL: Perform compression and vacuum tests to rule out mechanical issues.