Full speed/steam ahead
Definition 1 of 2
Pro Tip 1/3Action Decision
Used when decisively starting or continuing an action with energy. 
After the signal, it's full speed ahead with the race!
Pro Tip 2/3No Hesitation
Emphasizes immediate action without delay or second thoughts. 
We received the green light, so it's full speed ahead on the marketing campaign.
Pro Tip 3/3Urgency
Conveys a sense of urgency and rapid progress in a situation. 
Once the team heard the news, they moved full speed ahead to finish the project.