David Beauregard had the visitors ahead on 5.56 with a powerplay goal and it was on another powerplay that Luke Fulghum added a second on 8.04.
Carlyle Lewis pulled one back on 10.18 but Manchester went 3-1 up six minutes into the second period when Tony Hand netted on 26.32 from an Fulghum assist.
Back came the Blaze again, Sylvain Deschalets scored a power play goal from assists by Weaver and Calder.
That was on 29.17 and thirty three seconds later, it was three goals each when Russ Cowley fired home.
Unfortunately, Manchester went down the other end and re-took the lead through Alex Dunn.
Blaze coach Paul Thompson was fuming as the visitors went further ahead through Tony Hand getting his second of the night on 46.45.
Suddenly, the Blaze started to get back into the game. Adam Calder made it 4-6 on 49.36.
With the Coventry fans not used to seeing losing Blaze sides roaring the team on, Blaze went into the last minute. Erik Hjalmarsson scored from a Dan Carson assist on 59.37 and with seven seconds left, Sylvain Deschalets had the SkyDome rocking when he equalised after an assist by Calder and Carson.
So it was into over-time and Blaze who travel to Nottingham Panthers tomorrow afternoon (face off at 4pm), needed only 45 seconds to win the match when Danny Stewart scored from assists by Moore and Forsyth.