I have to agree with Alexander.
Without the serious economic issues of the early '90s, the Tories don't lose their support as quickly as they did. Since they're still considered trustworthy, their second attempt at constitutional reform, aka "fixing the biggest mess Trudeau left us", likely succeeds. Quebec signs on to the revised constitution, the softer half of the nationalist movement gets proof that they're better off in a united Canada, and there is no second referendum as support for separation remains lower than the results of the 1980 vote.
The passage of one of Mulroney's core policies gives the Tories a shot in the arm, and their coalition holds together mcuh, much better than it did in OTL. They most likely win another majority. Chretien and the Liberals don't gain any traction as they can't run on the economy and they can't take advantage of the divided conservative vote to win a majority. At best they can get a minority and most likely they remain the Official Opposition. The Reform party, in spite of sensible policies, can't attract OTL's decent field of candidates and can't devour half of the conservative vote outside of Quebec. So they stay on the fringes. The BQ can't gobble up the conservative and nationalist vote in Quebec, so they wind up as also-rans. Without the recession to make their mismanagement of Ontario blatantly obvious, support for the NDP doesn't implode. The federal NDP maintains a creditable caucus, and Bob Rae might actually have a snowball's chance at a second term.
A reelected Tory government in 1993 (presumably the election is held much sooner than OTL, so while it is still in 1993, it is in the spring rather than October) torpedoes Jean Chretien's career. The Liberal leadership was bitterly contested in 1990 and Paul Martin was rather sour about losing to Chretien. Chretien failing in '93 gives Martin an opening he can exploit. Martin takes over in '94 or '95. The Liberals will have a much better chance in ATL '97 as the electorate will be tiring of the Tories, and just as importantly, there has to be a recession sometime in the '90s, almost certainly before 1997. The question then become: What will a '90s Martin government look like? His 2003 government was a shambles that nearly saw him punted in 2004, and his subsequent minority was little better and eventually ended with him being tossed out. And the scandals he inherited from Chretien have dogged the Liberal Party ever since. So, what would a turn of the century Liberal government look like if they'd never had the chance to conduct the fraud that became AdScam let alone get caught with their hands in the till?
And what would a mid '90s Mulroney government do or look like? The economy is eventually going to sour. Their budgetary policies are eventually going to begin to bear fruit, and the public mood is eventually going to give them more room to make overdue cuts to programs and focus on repaying Canada's crippling debt.