Rick's Free Auto Repair Advice

Posts Tagged: cylinder misfire

P0300 P0301 P0302 P0303 P0304 P0305 P0306 P0307 P0308 P0309 P0310 P0311 P0312

Fix code P0300 P0301 P0302 P0303 P0304 P0305 P0306 P0307 P0308 P0309 P0310 P0311 P0312 Pinpointing cylinder misfire codes People ask me about misfire codes after they’ve replaced all the spark plug wires, coil, and plugs and they still have the code. Here’s a quick explanation of how a pro would attack the problem. First, if you’re getting a P0300 Random/Multiple Cylinder Misfire Detected code, that would indicate a universal problem that applies to all cylinders. In that case, start by checking fuel supply issues like poor fuel pressure caused … Read More

Fix Misfire problems

Fix Misfire problems Many misfire problems are caused by worn spark plugs, leaking spark plug wires, or bad ignition coils. So you should always start your diagnosis with the basics. In this case, it’s probably easier and cheaper to replace the plugs and wires since they’re cheap and you’ll have to remove those parts to check them. If your vehicle has multiple coil packs or coil-on-plug (COP) coils, switch them around to see if the misfire code moves with the switch. If so, you’ve nailed the problem. If you have distributor … Read More


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