Ok, so you disconnect the coil wire, screw the thing into the spark plug hole then what? One person has to crank it and another has to watch the guage or you do some weird thing with one arm on the ignition another holding the guage or what.

 

Yes, that's pretty much it. You also have to block the throttles wide open; and in FI cars, disconnect or otherwise disable the injectors.

It's easiest with 2 people, or with a remote starter switch that you can alligator-clip onto the solenoid.

 

Every compression tester ive used has had a valve that holds pressure in untill you release it. Usually about 6 cranks is good enuf to get the pressures your looking for. On your car you can leave the ignition alone and just pull the two injector fuses out. Also make sure you have all the plugs out during testing.

 

Ok, that works I thought it would decompress out the exhaust and you wouldn't be able to get any reading if you didn't look at it as it was cranking. Maybie I should just try to get my hands on 8 compression gauges