Bad move. Temp tags DO have your name attached to them. No joke, it's not unlikely that there's a warrant out for your arrest.
If you had pulled over, handed them license and registration, they would have seen that you have no insurance.
You tell them you just got the car and wanted to take it for a quick spin. They give you a ticket for no insurance.
YOU THEN HAVE THE OPPORTUNITY TO GET INSURANCE BEFORE YOUR COURT DATE, SHOW UP WITH PROOF OF INSURANCE, PAY A SMALL FINE, AND NOTHING HAPPENS.
Instead, you're looking at fines, possible arrest, license suspension, evading arrest, and maybe even obstruction of justice if the PA is feeling like a real ****.
Not your brightest move, bud.