From Longman Dictionary of Contemporary Englishbe firing/running on all cylindersbe firing/running on all cylindersinformal to be operating or performing very well The team is firing on all cylinders. → cylinder
Examples from the Corpus
be firing/running on all cylinders• The latter is a book in which the author is firing on all cylinders.• This company is firing on all cylinders.• Your Reticular Activating System is firing on all cylinders, your cortex is turning somersaults. 