With all spark plugs removed ~ A remote starter switch is handy ~ use it with ign key in ON position to test for spark @ each spark plug ~ use it with ign key in OFF position to check for compression ~ if your thumb gets blown off the spark plug hole then compression is good enuff to start & run the engine ~ good luck

Be careful with key in ON position because the engine could start ~ key in OFF position a remote starter switch will only crank the engine over but there will NOT be any spark @ the plugs