When to turn off the fuel injector in OBD II?
The misfire section of the OBD II document explains that if the PCM determines a cylinder is misfiring, the fuel injector can be turned off to protect the catalyst from damage. Once the fuel injector is turned off, the cylinder is now basically an air pump, which reduces the potential for catalyst failure.
What happens when the catalytic converter is misfired?
This is primarily due to the misfire count not exceeding the limit. But there’s another way Ford protects the catalytic converter during misfire conditions. The misfire section of the OBD II document explains that if the PCM determines a cylinder is misfiring, the fuel injector can be turned off to protect the catalyst from damage.
Is there a diagnostic code for a Ford misfire?
But this is a Ford, and misfire data parameters are not available in the enhanced data stream. You decide to connect a scan tool anyway and to check for possible pending trouble codes. Unfortunately, no codes are stored. For many techs, this is where a good day usually turns bad really fast. But not for you today.
How to diagnose a misfire in a Mazda?
How to Diagnose a Misfire 1 Break down of combustion. Loss of one or more of these will cause a misfire. 2 Types of misfire codes. There are two types of misfire codes. 3 Fuel pressure. 4 Injector seals. 5 Air (O2) Back in the good old days, your engine used carburetors to moderate fuel/air intake. …
How are fuel injectors fired in a DSM ECU?
The DSM ECU uses sequential firing of the injectors most of the time, we have injector drivers for each injector. It’s not a batch fire setup except when cold starting and under acceleration enrichment. The DSM ECU uses sequential firing of the injectors most of the time, we have injector drivers for each injector.
What are the symptoms of a bad injector control pressure sensor?
Cost of Replacing a Bad or Failing Injector Control Pressure Sensor. Common signs include starting issues, engine misfires, the Check Engine Light coming on, and a decrease in power, acceleration, and fuel economy. Our certified technicians can come to you and diagnose the problem.
What happens when a fuel injector is not working?
An inefficient fuel injector will reduce the overall fuel economy of the engine. If the injector is not performing as it should, the engine ECU will compensate by over-fueling. This causes the engine to run “rich”, leading to more fuel being used than necessary.
What to do if your fuel injector misfire?
A cylinder misfire will trigger an error code for each cylinder that’s misfiring. If you know it’s an injector, try running a can of seafoam through the car to clean it out. You should only need to add it to the gas tank and through the intake via a vacuum line.