its not burning all the fuel in the cly causing a rich mode
P1309 Misfire Monitor Disabled
Trouble code P0300 means:Random/multiple cylinder misfire detected
It means the coil or the spark plug is dead.
Trouble code P1399 means: Multiple / Random Misfire Detected Check gap of spark plugs or replace them
This is a Honda only code which means you have a random cylinder misfire. If you have not replaced the Spark Plugs & Wires, do so now. Use OEM spark plugs.
It means a cylinder 4 misfire. Check spark plugs, spark plus wires, possibly head gasket.
Misfire on cylinder #3, not sure of the cause (no spark, blown gasket, injector problem).
Code P0304 on a 2004 Suzuki Verona indicates a misfire detected in cylinder 4. This can result from various issues, including faulty spark plugs, ignition coils, fuel injectors, or even vacuum leaks. Diagnosing the specific cause requires further inspection of the ignition and fuel systems. Addressing the misfire is important to maintain engine performance and reduce emissions.
P0303 is cylinder #3 misfire. P0300 would be random misfire. Either way you need to diagnose the case of a misfire. Check spark plugs, plug wires(if equipped), cylinder compression, fuel inectors, and wiring.
P0300 means random misfire detected which probably has to do with the spark plugs or the plug wires
P0302 is a cylinder number two misfire. Causes include spark plugs, injector, internal engine failure, etc.
That error code is for a single cylinder misfire. Bad spark plugs or wires can cause this as well as a bad fuel injector.