Greetings, to add a data on the Corsa there are models that are handled in series, that is, two injectors are handled by a cable of the ECU, and the other two other cable, if I remember the most I think 1 and 4 and 2 with 3 the series injectors, you have to take this into account when measuring why we disconnect all the injectors and measure volts we will have a reading of 0 volts in two of them.问候。