Misfiring, codes P0301 and P0304

2010 NISSAN ROGUE
148,000 MILES • 2.4L • 4 CYL • 2WD • AUTOMATIC
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EULOS SPEYRER
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Misfiring cylinder 4, changed all spark plugs, cylinder 4 ignition coil. Started running perfect, started misfiring again cylinder 4 so swapped out spark plug and ignition coil with cylinder 1 still the same. Nissan computer through codes P0301 and P0304. Checked all spark plugs and ignition coils all were good. Any advice would be appreciated. Thank you.
Sep 8, 2020 at 4:39 AM
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ASEMASTER6371
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Good morning,

The first thing I would do is a compression test to verify that there is nothing wrong in the motor causing this issue.

https://www.2carpros.com/articles/how-to-test-engine-compression

The next thing would be to check the fuel pressure. Low fuel pressure will cause misfires.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

I attached the spec for the fuel for you.



Roy
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Sep 8, 2020 at 5:10 AM