Daewoo ESPERO car engine fuel consumption excessive

         Troubleshooting: According to the above phenomenon, the first short circuit diagnostic connector, output fault code 33, check repair manuals, code meaning: Intake vacuum of low pressure sensor output voltage. 

         Generally, the intake air pressure sensor output voltage is raised with decreasing vacuum, will gradually Opel tech 2 increase from less than 1V to 5V, the voltage signal that is passed to the computer gradually increased to a large load when the state changes from an idling state. Computer accordingly extended injection time signal accordingly. With the increase in the intake air, fuel injection also increased to meet the rapid acceleration, high load conditions "multi intake, multi-injection" requirements, while the proportion of the mixed gas in a variety of conditions to maintain optimal . 

        After analysis, the car guzzling reason may be the pressure sensor output voltage is too high, so that the actual injection quantity exceeding the required amount of fuel injection, resulting in a mixed gas concentration is too high, causing increased fuel consumption. To measure the pressure sensor output voltage, with a thin wire, connect the sensor VDM UCANDAS output (middle end), in the idle state, the measured voltage is 5V, much higher than normal, which may be due to a vacuum leak, the vacuum suction can not spread to internal pressure sensor. Checked and found vacuum in the intake manifold disengaged metal tube. 

         Remedy: The vacuum tube plugged into the metal tube voltmeter readings immediately drops below 1V, increase the throttle, the voltage rises, view the fault light goes out, the system is normal. After ten thousand kilometers of vehicle confirmed that fuel consumption has been reduced to normal levels, failure to eliminate.

Report this Page