Car finance company putting pressure on not pulling out

Hi all, Just looking for a bit of advice as I’m not sure how much I can trust the salesman. I have been looking into financing a car and have gone through the process to the point at which I have been offered finance on a car but am now wanting to pullout (the car seems a little too cheap and my gut tells me it’ll sting me if I buy it). I’ve told the salesman from the finance company that I no longer want to go ahead. However, he’s obviously trying to change my mind and get me to sign the agreement.

His argument seems to be that the hard check has been done and so it would negatively impact me. Is that correct? I haven’t signed anything yet.

Any advice or input would be greatly appreciated.