Most of us know the procedure involved in carrying out an engine compression test. Right ? Engine hot, accelerator pedal fully depressed, and turning over engine for about six or seven revolutions. Normally, to carry out the test, it needs two people, namely one to activate the turning of the engine, and the other that holds the compression gauge in the spark plug hole.
Now, there MAY WELL BE another method of carrying out the test. Some gauges are supplied with a screw type fitting...