Will be back, need a socket extension. So, I unplug all the spark plugs and coil wire? Insert tester in cylinder #1 and turn the ignition for about 10 sconds?
1 warm the car up 1st
2 make sure your battery is full
3 unhook coil wire
4 open carb full thottle
5 can either pull all the plugs or 1 at a time
6 note the reading after 2 cycles then get reading after 5 or 6
7 hope you have 145 psi reading and all closely read the same