THE jilted Victorian arm of the Australian Motoring Enthusiast Party has hired a private investigator to dig up senator-elect Ricky Muir's past.

The Herald Sun understands the father of five has expressed concerns to party executives that his past would haunt him.

"We've got an investigator looking into him," former AMEP Victorian chairman Scott McDonald said. "There's definitely things in his past that he's very worried about."

It comes as 290 Victorian AMEP members were invited to a meeting in Melbourne next week to vote on whether to eject the Denison family man from the party and put at risk his $200,000-a-year Senate seat.

"We've got a lot of angry members at the moment," Mr McDonald said. "This deal was never discussed before or after the election. It seems at this point a decision signed off by two people with no consultation with members, council or executives. The AMEP is now a puppet to the Palmer United Party."

The rookie politician today announced an alliance with mining magnate Clive Palmer.

Within minutes of Mr Muir announcing in Sydney he had signed a memorandum of understanding to work together and vote in line with the Palmer United Party, fans took to social media to express their disappointment and outrage.

Supporters slammed Mr Muir for "jumping into bed" with Mr Palmer.

Within minutes of the announcement fans took to Mr Muir's Facebook page to express their disappointment and outrage.

Some voters even called for the Gippsland father-of-five's resignation.

"What a joke this is," Naed Mills said. "Do the right thing mate and resign. You did not really win an election. After watching your press conference you have NFI."

Another disappointed fan Vaughan Yuk Cumiskey wrote: "Nice to see all my mates who voted for you may as well have voted for Clive Palmer!!! Did he buy you mate, or is it just that you are in over your head ...?"

Melissa Lowe asked: "Have you got any understanding whatsoever of what you've just done by agreeing to vote with Palmer? NO, I didn't think so."

While Sean Jakstas said: "Disgusted. I want nothing to do with you, your (sic) a joke."

Some voters even called for his resignation, saying the "dirty deal" had lost their vote for AMEP.

But Mr Muir defended the move saying it would give him a "stronger voice" to serve his constituents more effectively.

"With three extra Senators working together, I will be able to achieve more than I would have on my own for the people of Victoria and Australia," he said.

The deal extends the PUP's power in the new Senate.

It could also mean Mr Muir, who was born and bred in the Gippsland region, would have to back against residents' wishes in his stomping ground if PUP decides to support the controversial coal seam gas exploration in the area.

The AMEP tried to put voters' minds at ease by responding: "We have agreed to work together in the Senate. However we remain individual parties. This is a good day for motoring enthusiasts."

The alliance could prove powerful for motoring enthusiasts as Mr Palmer is also known as a massive petrol head and has a 150-car collection worth more than $20 million.

Earlier this year, the avid car enthusiast made headlines when he said the government should abandon the National Broadband Network and instead give Aussie motorists electric cars.

The allegiance comes in what has been a tumultuous week for the motoring enthusiast party following allegations the party's founder, Keith Littler, had gagged Mr Muir after he had strangely not spoken publicly since he secured a seat in the Senate last week.

But that silence was broken today when the deal was struck with Mr Palmer.

It also follows news that Mr Littler and the four other executives on the AMEP's central executive sacked the leadership of the Victorian branch amid a feud over an unauthorised state-based AMEP Facebook page and their attempts to facilitate a media interview with Mr Muir.

In a letter sent to the party's 290 Victorian members on Sunday, AMEP chairman Tony Standfield said the state council had misused the AMEP brand and published conflicting messages to the public regarding the party's opinion and stance on road safety initiatives.

He said the Victorian council were acting against the best interests of the AMEP and Mr Muir.

Mr Muir reportedly supported the unanimous vote to remove the council members.

The weeks of upheaval has caused many members to question whether they have wasted their vote on the party.

The Herald Sun understands dozens of the party's members have demanded their $20 annual membership fee, used to support the club's activities, be refunded.