'80 928 injectors continually powered

[peggy spiers]

I have a 1980 Porsche 928 with power at the injectors at all times. Can anyone tell me the cause, or where I should start looking to fix?

[928gene928]

I have a 1980, and although my problem was the opposite of yours, injectors would not go on at all, it turned out to be a relay. Possible that your relay is stuck closed???

[Danglerb]

Power should only be ign on, but its constant, brain switches ground to pulse.

Relay, ign switch, previous owner mischief.