went down to autozone bought a compression tester than went home removed 15A fuse,spark plugs,intake pluged in c.tester went in my car held down the gas and turned the key over 5 times loked at the gauce through windshield nothin happend tried on #1and4 piston a few times didnt get no readings at all,yes my car is runnin good and dosent burn no oil,can anyone help please!

 

You screwed it tight into the spark plug hole?