× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network

P0304 Diagnostic Trouble Code Discussion for September 2020

Cylinder 4 Misfire Detected


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0304
Help Request Posted
2008 Kia Rio EX 1.6L Hesitation, Misfire
P0304: testing and results. Car come in with a misfire on cylinder 4. Replace sparks and coil do to oil leak form rocker cover.. Still has a misfire when looking at mode 6 data the misfire conter are on cylinder 3...test injector all omhs good..check compression all good. Check coil ...
September 15, 2020
2009 Mini Cooper S 1.6L Misfire VIN: WMWMS335X9
P0304: Missfire cyl 4. So I am pretty sure I have a plugged or dead injector question is do I need the injector removal tool or will it come out without it other question is this a snap on scanner thing or are the cylinders transposed on these cyl 1 is at the transmission side a...
September 24, 2020
2009 Mini Cooper S 1.6L Misfire VIN: WMWMS335X9
P0304: Missfire cyl 4. So I am pretty sure I have a plugged or dead injector question is do I need the injector removal tool or will it come out without it other question is this a snap on scanner thing or are the cylinders transposed on these cyl 1 is at the transmission side a...
September 30, 2020
2003 Subaru Baja 2.5L Excessive Emissions, Poor Idle Quality, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy VIN: 4S4BT61CX3
P0304: Cylinder 4 Misfire Detected. I HAVE A REAL PUZZLER HERE, THANKS FOR HELPING ME OUT. THIS IS ONLY THE SECOND TIME WE HAVE SEN THIS CAR, ONCE FOR AN ENGINE AND NOW FOR THIS RUNABILITY ISSUE. THIS CAR STARTS AND RUNS LIKE A TOP UNTIL IT GOES INTO CLOSED LOOP. AFTER THAT, IT STARTS TO RUN...
September 30, 2020