Cracking the P0304 Code The Ultimate Diagnostic Handbook

After running a diagnostic, we have identified the code P0304 - 4th cylinder misfire. After conducting some research I'm finding this a common ... I would only replace ignition coil on cylinder 4 and replace all of your spark plugs. With fresh spark plugs you can expect the rest of the coils to last long. The code scanner says P0304 which is cylinder #4 misfire. The car is 100% stock except for the Borlas. Has anybody have the same problem? Cylinder 4 in is the plug next to the gearbox not the middle. The lead is most likely the fault. Regards, Merlin. P0304 is defined as “Cylinder 4 Misfire Detected”. It is an OBD-II Diagnostic Trouble Code (DTC) that indicates problems with your car's cylinder number 4. The first plan of attack is to replace the coil and plug...in this case on cylinder #4. Has anyone else had this same issue and found that that was the fix? The car's CEL came on and it went into limp mode. When I had the codes checked, we came up with P0304 and P2646. I ordered and replaced the VTEC Solenoid ... ... P0304 code this past Sunday (4/24). I reset my ECU and the car ran fine until the next day (about 70 miles later) when the code popped up again. His CEL came on with a P0304 code. He told me he feels the misfire on cold starts, but it drives fine. We replaced the cylinder 4 coil pack ... I think it was the selection of a looser interference fit on the valve seats for easier construction, and poor valve locks. Overheating the ...