I would appreciate if anyone would reply with the correct procedure on how to perform a compression check on my car. I have received conflicting instructions and want to make sure I get an accurate proper reading.

I know I need to remove the coil wire, but my first question is should I remove ALL the spark plugs first, or only remove 1 plug, then test that cylinder, then replace it and move to the next plug?

Also, I have heard different stories about whether or not the fuel pump relay should be disconnected so no gas is being forced into the cylinder(s). Also, I have read articles about performing the test and some state to perform the test under WOT. Should I open the throttle while cranking the engine over a few times (or have someone push the gas pedal down)?