Why would a car pass a block test but fail a hard rev test?

What is your question?

Dealer stated verbally that car passed the block test, no leaks and fans working. Then a day later dealer said car failed the hard rev test. Why would it pass one and not the other? Car not getting not at all. Gauge is basically a tad below middle as it always has been. They charged me $95.00 for the diagnosis and I'm confused about their results.