#Ecu tuning meaning code

The DSM air metering system consists of four parts: the karman vortex sensor in the MAF, and intake air temperature sensor, the intake air pressure sensor (barometric pressure sensor), and the ECU.

#Ecu tuning meaning code

This is the job of the air metering devices, and some of the code in the ECU, which interprets the information from these devices. In order to know how much gasoline it needs to inject, it needs to know how much air is coming in, and what the target air to fuel ratio (A/F ratio) is at that point in time. The ECU needs to calculate the amount of fuel to shoot into the motor. For example, if you have 14.7 pounds of air, you need 1 pound of gasoline to burn both of them completely. The basic premise is the combustion of gas and air is a chemical reaction, for which you need a certain amount of air molecules and a certain amount of gas molecules.The mass of a fluid is directly proportional to the number of molecules of said fluid, and thus by knowing the mass of something you can figure out the number of molecules.Ĭhemically, it turns out that in order to have a reaction that uses up all of the gas and all of the air available, you need to have about 14.7 times the mass of air, as you have the mass of gas. Now, in order to keep this short I’m going to keep the chemistry to a minimum, if you want more description in that area ask or start another thread. The goal of the DSM air metering system, and any air metering system really, is to be able to calculate the mass flow of the air entering the motor. If you don't currently have a wideband UEGO sensor in your car/truck than first start by purchasing and installing a wideband sensor:įirst, a quick overview of the DSM air metering system: The following was written for the DSM platform but can be applied to others. MORE AIR FLOW=RICHER A/F RATIO?.its possible This will achieve the best fuel economy while supporting for lots of airflow.Ģ. * Your target AFR should be around 14.7:1 in vacuum, around 12.5:1 at static, and around 11.5-11.0:1 as you approach your peak boost level. Air Fuel Tuning (A/F Tuning) Programming ECU settings for a optimul A/F Ratio