Hey everyone, new member here. I have an '02 Firebird with a 3800 Series II. As of late, I've been getting a trouble code for a misfire in cylinder 2. I've already replaced plugs/wires/coils but it's still misfiring, so I want to check the cylinder's compression next. I borrowed a compression gauge from O'Reilly, but the thread size on it was too big to screw into the spark plug hole. Is anyone aware of a compression gauge that'll fit that I could buy without breaking the bank?