turbo timers are pretty pointless. do you have an alarm/immob fitted, as they can cause a bit of a headache with that too.
If you have neither, and you really have to have a turbo timer, i suggest you purchase an alarm/immob that has one built in.
Alternatively, you can keep the car off boost for the last mile or two of the journey/sit in it for a minute or so when you reach your destination.
All obvious stuff i know, but just my 2 pence..
Tom