Instead, the result sees Egypt return to the World Cup for the first time since 1990.
Egypt entertains Congo at the Alexandria based Burg El Arab stadium on Sunday 8 October as the 2018 FIFA World Cup qualifications Group E enters its penultimate round.
Salah opened the scoring in the 63rd minute on Sunday evening, but his effort was cancelled out by Arnold Bouka Moutou two minutes from the end of regular time.
Congo nearly ruined the party when Arnold Bouka volleyed home to peg back the hosts after Salah's second-half opener.More news: India, Australia to play first T20 match in Ranchi today
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Former Egypt manager Bob Bradley has congratulated the Pharaohs for reaching the 2018 World Cup in Russian Federation after beating Congo on Sunday. Here's how much it means to Egyptian fans.
But Congo threatened to turn party-poopers as substitute Moutou, a France-based defender, beat 44-year-old goalkeeper Essam El Hadary from inside the box.
In the three decades since their last World Cup appearance, Egypt have won four Africa Cup of Nations titles - in 1998, 2006, 2008 and 2010 - but never taken that form into World Cup qualifying.
Their latest attempt to do so had seen Argentine coach Cuper forced to take medication for high blood pressure.