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P0304 Diagnostic Trouble Code Discussion for December 2021

Cylinder 4 Misfire Detected


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Trouble Ticket Help Requests for DTC P0304
Help Request Posted
2009 Subaru Outback 2.5i Limited 2.5L MIL Lamp on VIN: 4S4BP66C69
P0304: 4 misfire. Codes occur only after driving more than 100 miles. Do pressure drop test on injectors and it ok. Good vacuum reading, no leak headgasket. No vacuum leak.anyone has these 2 codes before
December 13, 2021
2008 Pontiac Solstice GXP 2.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G2MG35X78
P0304: testing and results. Car is flashing misfire from the time you crank it up. All four cylinders are misfiring the same amount.I have replaced everything including fuel injectors, high pressure pump,intake gasket,cam sensors,crank sensor,cam actuators intake and exhaust,spark pl...
December 14, 2021
2011 Subaru Outback 2.5i 2.5L Cuts out, Misfire VIN: 4S4BRCKC1B
P0304: Misfire Cylinder 4. ... ignition coil issues that need replacing every month or 2, previously preformed by a local Subaru dealer & an independent auto repair shop. When I pulled trouble codes it had misfire codes on both drivers side cylinders #'s 2 & 4. I pulled all ...
December 14, 2021