Random misfire, cylinder 2 misfire, and cylinder 3 misfire. see related question below.
Its a random misfire detected
You locate the cause of the random misfire and take corrective actions against that; be it a coil, plug, wire, coil boot or crank sensor. A random misfire is as it states - a misfire that happens randomly in possibly a random cylinder as well. They can be hard to diagnose, as well and it is recommended that you take vehicle to a qualified, ASE certified shop for diagnostics.
answer : Random Misfire
po300-Random/multiple cylinder misfire detected. po303-Cylinder no. 3 misfire detected. po306-cylinder no. 6 misfire detected po300-Random/multiple cylinder misfire detected. po303-Cylinder no. 3 misfire detected. po306-cylinder no. 6 misfire detected
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.
It means that more than one cylinder has a misfire history. PO301 would be cylinder number 1 misfire. PO302 would be number 3 cylinder misfire.
Many possibilities. Plugs, plug wires, coil, ignition module, fuel injector, head gasket. Essentially anything that interfers with combustion on 2 or more cylinders.
This just happenned to me. I was getting a code PO300. It turned out to be the ignition control module. It cost 78.00 at autozone and only took 10 minutes to replace.
P0300 is multiple or random cylinder misfire.
Random/multiple misfire detected.
Multiple or random cylinder misfire.
random/multiple cylinder misfire!
Multiple & or random misfire(s)
P1399 Random/multiple misfire detected.
You could have plug wires going to the wrong plug on either end, it could be out of time. If the plug wires are ok and the misfire keeps up check your coil packs and ignition control module. If this is faulty or even if you have a loose connection (the wire harness is bolted to it) you will have a misfire, usually gives code for a random misfire in 6 or 4. from my experience.
p0300 is a multi-cylinder misfire code it is because the logic circuit cannot determine which cylinders because they are random
Random cylinder misfire
multiple random misfire on 4.3 vortec why?
P0300 = random misfire.
P0300 = Random/multiple misfire detected
CLEAN THE INJECTORS. OR HAVE THE INJECTORS CLEANED BY A GM TECH.
The first step in resolving this problem will require isolating and diagnosing the problem(s) causing the misfires. These include the spark plugs, plug wires, ignition coils, and the ignition command module, among others.