How do i change spark plugs on 1995 buick regal 3.8?

its misfiring and they want to charge me 90 bucks for a diagnostic so i want to change out my plugs to see if that fixes it.How do i change spark plugs on 1995 buick regal 3.8?
Its not hard,You will need a 5\8 spark plug socket,and 3inch 3\8 drive extinsion,and a 3\8 ratchet,and a spark plug feeler guage to get started. Only do one plug at a time so you dont get plug wires confussed,be careful not to damage plug wires during removal and work on a cool motor so you dont get burned.How do i change spark plugs on 1995 buick regal 3.8?
First, get a diagnostic at Auto Zone, it's FREE!!! While you are there, have them show you where your IDLE AIR CONTROL VALVE is. Buy Amzoil Foaming Cleaner and use it to clean out this thing, and your throttle body and throttle plate. DON'T buy the original plugs. Buy either Bosch Platinum single point or Fusion plugs. You will be amazed at how much hidden power and extra fuel mileage you can get. Your emissions will drop, too. Good Luck!!