common prob with k-jet /ke-jetronic is they like to be used, so when left standing for a long time the valve plunger sticks so the flap moves but the valve pushrod stay's in the closed possition, I have come across this prob loads of times with xr3i's, rs turbos, xr4is etc and how i solved prob was to take the metering head off the car, soak it with wd40, leave for a while and just keep playing with the flap until it moves freely. failing that its been known for the fuel in the pipes from the metering head to the injectors to gel up so unscrew the pipes off the injectors and run wd40 thru them as well, shud solve prob