Re: Compression test how to

[Craig Foch <cbfoch@charter.net>]

It is also good practice to disconnect the coil wire from the 
distributor and ground it (or otherwise disable the ignition system). 
Cranking the engine with the ignition key sends power to the coil. If 
you just disconnect the plug wires, all that high voltage will go 
looking for mischief--like burning through the plug wire insulation or 
setting fire to those little puffs of gasoline vapor coming out the 
other three spark plug holes.

Craig Foch
San Luis Obispo, CA
1963 TR4 CT22268L