i have had my corsa 4 about 5months and the engine managment light keeps cumming on. i checked all the sensors n found under the single point injector their is a idle control valve (well i fink it is!!!) this was blocked with carbon deposit i tryed 2 trace it back and it goes 2 a 1way vacuum this was blocked 2, then i emptyed that 2 and their is a pipe that goes 2 that and was blocked i tryed 2 remove it but it goes in under the drivers wheel arch then into the car but i cant find it iside the car. any1 have any ideas where it could go 2 or the cause of the blockage??? please help im realy stuck!!!