Monthly Archives: April 2018

DIY Tune Up Base on Misfire Codes

A tune up for cars based on innovative technology and design vehicles. Cars require much less attention when it comes to maintenance items that affect engine performance. Modern vehicles use computerized system technology to ensure optimum performance. If the Service Engine Soon (SES) light appears, then the computer informs you that there is a problem with the vehicle engine. All problems are displayed in the form of codes. The problem that often arises in the case of a machine is misfiring; code of misfires is set or stored on your car’s computer.

The misfire code includes P0301, P0302, P0303, P0304, P0305, P0306, P0307, and P0308. The codes indicate that there is a misfire in the cylinder; the last number indicates which cylinder is problematic. The misfire malfunction code does not tell us why the machine is misfired; only showing one or more cylinders is not working properly. The OBD2 system checks for misfire that occurs on the engine cylinder by detecting small changes in crankshaft rotation through the input of the crankshaft sensor as the engine rotates.

Misfire causes a slightly decreased crankshaft spin which is translated by OBD2 as a misfire. Misfire at a small level is still said to be normal, but if the machine misfires in a large degree for a long time then OBD2 will generate misfire code. However, checking the machine periodically is the safest option.

Misfire is a mechanical problem with the machine, so anything that may affect engine performance can lead to some of misfire codes appearing on the diagnostic tool, such as, mileage, wrong fuel, and coolant leaks on cooling systems. In some cases, if you lose enough cooling to get the head temperature up, it could cause a pre-ignition that can trigger the misfire.

Another cause of the P0300 code is due to a loose or cracked vacuum hose, a leak in the intake manifold gasket, or a leak in the brake vacuum booster, spark plugs, spark plug wires, coil ignition, fuel injector, timing belt, and weak compression. Misfire appears also based on the type of vehicle; there are many different types of cars that require different handling as well. So, you should look for service guides for your specific car. Most importantly, when the service engine soon light appears, it should start with a quick scan with the code reader. All possibilities should be checked carefully to get the cause of the misfire.