2002 Dodge Dakota P0300 Code: Random Misfire Diagnosis and Solutions
My 2002 Dodge Dakota V6 4x4 is showing a persistent P0300 code indicating random misfires. When the issue occurs, the engine sounds like it's spitting or coughing—though I've since confirmed this is due to fuel injection problems, not carburetion (modern engines use throttle bodies). I've already replaced all spark plugs, wires, distributor cap, and rotor, and cleaned all sensors and electrical connections. The vehicle experiences significant power loss; the only way to get it to respond is by flooring the accelerator until it shifts into passing gear. It has 109,000 miles on the odometer. I'm seeking advice on how to resolve this issue effectively.
Are there any other diagnostic trouble codes present? Can you confirm your OBD2 scanner reads all stored codes? What did the old spark plugs look like—were they wet or blackened? Did you install the correct type of spark plug for your engine? Perform a fuel pressure test, paying close attention to pressure drop and checking for injector leaks. Is this vehicle stock (no modifications)? Note: The term 'carburetor' is outdated; modern engines use a throttle body instead.