An engine's cylinder misfires when ignition occurs at the wrong time or not at all. Because the engine's moving parts must be in exact locations at the moment of the spark, incorrect timing often results in loss of power or a choppy ride.Continue Reading
A car's gasoline engine converts fuel into mechanical energy through combustion. A mixture of gas and air are heavily compressed by pistons in the engine's cylinders. The spark plugs then ignite this volatile mixture, causing it to expand violently and move the pistons outward. The piston's back-and-forth movement is harnessed and used to move the vehicle.
But, with so many moving parts working in concert, any number of issues can destroy the precise timing necessary and create a cylinder misfire. While dirt and bad wires can affect the spark plug's ability to create ignition on time, other steps can also be compromised. For instance, bad injectors can change the composition of the fuel mixture, possibly creating a weak explosion that cannot properly move the piston. A broken piston, on the other hand, cannot move at all.
Fortunately, however, many of these issues can be avoided with preventative maintenance and keeping the engine properly tuned. Additionally, requesting a trouble-code scan annually can help detect problems before they become serious.Learn more about Car Parts & Maintenance
A car immobiliser disables one of the systems needed to start a car's engine, usually the fuel supply or the ignition. This is accomplished by RF identification between a transponder in the ignition key and a device called a RF reader in the steering column. The transponder sends a signal with a unique identification code to the reader, which relays it to a receiver in the vehicle's computer control module.Full Answer >
To adjust the ignition timing on an older car with a distributor, wire up a timing light and run the engine with the light pointed at the crankshaft and the pulley that extends from it. The notch on the pulley is the top dead center, and it should flash when the timing light hits it. Three to five degrees before top dead center is the ideal position for the distributor.Full Answer >
Diagnostic code PO300 indicates a misfire of a cylinder in a vehicle’s engine, but it does not indicate the cylinder in question or the reason for the misfire. When the code features a digit other than zero, the digit indicates the misfiring cylinder number; for instance, if the code is PO302, it indicates misfiring of the number two cylinder.Full Answer >
An engine misfire occurs when one or more of the cylinders inside the engine doesn't fire correctly. It is caused by an interruption of the air-to-fuel ratio inside the combustion chamber in the cylinder.Full Answer >