power lock pump 4kq help

[Brian Devlin]

>
>It is my belief that the pump runs on a timer - there is no vacuum or
>pressure threshold at which they cut out.  You might possibly not be
>letting it run all the way to end of the "lock" cycle before trying to
>"unlock," but that is unlikely, I only mention it as a possibility.
>
>

Actually they will run much longer if there's a vacuum leak, half a
minute or so.
-Brian