Ignite Your Diagnostic Skills P0304 Code Troubleshooting for Beginners

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 single most likely cause at 26k miles is a spark plug issue. Please see "A Short Treatise on Spark Plugs" for more info. P0304 is a diagnostic trouble code (DTC) that indicates a misfire in the fourth cylinder of your 2000 VW New Beetle's 2.0L 4-cylinder engine. Cylinder 4 in is the plug next to the gearbox not the middle. The lead is most likely the fault. Regards, Merlin. I got code P0304 which is Missfire Cylinder 4. I replaced the plugs and I still got the P0304 code. It starts up rough (cold or hot) and that's where it ... That is the connector for the fuel injector on #4 cylinder. That is the cause of the misfire and your check engine light. Some/ most dealers ... Replace the spark plug (don't forget to check/set the gap. Unplug the wiring harness from the old coil pack and plug in the new coil pack. Push ... I am getting a P0304 code CYLINDER #4 MISFIRE Misfire detected in cylinder #4. I know it could be a couple of things. I have new plugs, ... It threw a code P0304 (misfire #4 cylinder). Here's the steps I took so far: Bought new coil packs, switched injectors, tested injector wires and plugs, ... The P0304 code means that the cylinder 4 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is ...