can i do relative compression with a synch?

[blake]

I had a vehicle that had a dead cylinder and a weak cylinder that showed up during the relative compression test using the pico diagnostics software. my question is can i add a synch cylinder to that test so i can use the firing order to determine the dead cylinder and the weak cylinder? the vehicle had plug wires so i just wanted to use my inductive pickup probe for my synch cylinder.

Any help is appreciated,

Blake

[volrem]

Use Picoscope (not Picodiagnostics) and measure starter current with amp clamp. Sync with one of cylinders.