Electronica Automotris y Diagnosticos. Fuel Trims Ejemplos de Algunos Vehiculos Reparados.
Solo para referencia.
Ejemplos para referencia de algunos vehiculos reparados. Alguna informacion puede estar en ingles
Live Data Using scanner
This is an example of good fuel trims readings from your sanner. Fuel trims should be close to 0%.
Based on a air/fuel ratio closest possible to 14.7:1, as 14.7 units of air mixed with 1 unit of fuel. In ideal conditions, the fuel trim will be always at 0%.
| Live Data | Value | Range | Unit | Condition |
|---|---|---|---|---|
| Short Term Fuel Trim Bank 1 | -2 | -25 - 25 | % | Fuel trims should allways be close to 0 |
| Short Term Fuel Trim Bank 2 | 0 | -25 - 25 | % | Same as top |
| Long Term Fuel Trim Bank 1 | -5 | -25 - 25 | % | Same as top |
| Long Term Fuel Trim Bank 2 | -6 | -25 - 25 | % | Same as top |
| Engine speed | 574 | 0 - 7000 | rpm | |
| Engine Coolant Temp Sensor | 160 | 40 - 248 | F | |
| Mass Air Flow Sensor | 6.53 | 0 - 300 | g/s | |
| Map Sensor | 5.8 | 0.00 - 15.95 | psi | |
| Barometric Presure | 14.07 | 8.70 - 15.95 | psi |
Live Data Using scanner
This is an example of bad fuel trims readings.The owner changed oxygen sensors, map sensor, fuel pump regulator, mass air flow sensor, purge valve and fuel injectors by the way chip injectors! After replacement of good injectors the fuel trims changed. See top table!
OBD codes P0172 & P0175 engine is running too rich bank 1 & bank 2 (In this case the problem was chip bad fuel Injectors)
| Live Data | Value | Range | Unit | Problem Condition |
|---|---|---|---|---|
| Short Term Fuel Trim Bank 1 | -29 | -25 - 25 | % | Rich Condition low air too much fuel entering. (Lean Condition is the oposite, Too much air entering) |
| Short Term Fuel Trim Bank 2 | -30 | -25 - 25 | % | Rich Condition low air too much fuel entering. Same as top |
| Long Term Fuel Trim Bank 1 | -17 | -25 - 25 | % | Rich Condition low air too much fuel entering. Same as top |
| Long Term Fuel Trim Bank 2 | -17 | -25 - 25 | % | Rich Condition low air too much fuel entering. Same as top |
| Engine speed | 574 | 0 - 7000 | rpm | |
| Engine Coolant Temp Sensor | 160 | 40 - 248 | F | |
| Mass Air Flow Sensor | 6.53 | 0 - 300 | g/s | |
| Map Sensor | 6.38 | 0.00 - 15.95 | psi | |
| Barometric Presure | 12.76 | 8.70 - 15.95 | psi |