Pitstop timing adjustment

Hi all,

Wondered if anyone could help me regarding pitstop timings?
Whenever I pit for refueling / repairs, my car is ready to go pretty much immediately, always 5 second (approx) pit stop time.

I've used GP4 Tweaker and enabled "pit stop timing adjustment". This appears to have an affect on the other cars in game, but the player car appears to have much quicker pit stops than the AI. Is there a way to prevent my player car from being released almost immediately, as it gives an advantage against the computer controlled cars.

Thanks all!
Daryl