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Originally my car was misfiring - I replaced the Mass Airflow Sensor.
Checked the spark plugs, realized there was oil in the wells, & carbon on the coils.
I changed the ignition coils, spark plugs, & valve gasket cover, & cleaned the wells.
Got an oil change.
Car ran good for about a month.
Started chugging badly, service engine light came on.
Threw code P0300.
I double checked my previous work, & it was good.
Changed PCV valve, Air Intake Manifold Gasket, Throttle body gasket, & cleaned both Manifold & throttle body.
Still threw code P0300, chugging & sputtering w/service engine light.
Ran I/M Readiness test - X on CAT, EVAP, O2S.
Changed the Vapor Canister Purge Valve / Solenoid, changed the fuel pump.
Service Engine Light is off, but still chugging.
Throwing new code misfire on cylinder 4.
Triple checked ignition coils, spark plugs, fuel injectors, changed the ignition coil connectors.
Changed Camshaft position sensor & connector.
Now it hiccups.
What am I missing??
What makes this problem better or worse?
N/A
How long has your 2011 Nissan Cube had this problem?
2 months
