South Australian Lucy Gichuhi, who was recruited from the crossbench earlier in the year, has vowed to outline her claims under parliamentary privilege.
She says colleagues pressured her during the bitter leadership spill which resulted in Malcolm Turnbull losing his job.
Prime Minister Scott Morrison ultimately won a partyroom ballot against Peter Dutton.
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Senator Gichuhi revealed she was asked if Mr Turnbull was the right man to lead the coalition to the next election - two months before the plot became public.
"For that question to arise then, something was already happening I guess," she told ABC radio.
The question came during her preselection process, which led to her being relegated to the unwinnable fourth position on the Liberals' SA ticket for the next election.
Senator Gichuhi is calling for the Liberals to adopt a formal dispute resolution structure, describing the current process as a pure "kangaroo court".
It comes after Victorian MP Julia Banks announced she wouldn't recontest her seat, blaming bullying and intimidation from fellow Liberals.
Minister says Julia Banks 'no petal'
Minster for Women Kelly O'Dwyer savaged Liberal figures who told federal MP Julia Banks to toughen up after she quit politics over bullying claims.
Ms O'Dwyer said she was "disgusted" by the comments, arguing bullying and intimidation had no place in the party.
"Julia Banks is no petal. She's no snowflake and she's no princess," Ms O'Dwyer told the ABC on Monday night.
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"If you play Australian Rules football, it's a robust sport, but we do not say it is at all acceptable for someone to punch him in the head behind play?"
Ms Banks has announced she would not recontest her marginal seat at the next election, citing intimidation by colleagues during last month's leadership chaos.
Liberal backbencher Craig Kelly said MPs needed to roll with the punches in politics while the party's Victorian president Michael Kroger has denied a culture of bullying.
