Ok so I just got an old Sachs suburban for $80 I’m trying to figure out why I’m not getting spark. I have been able to get very week spark from it but nothing consistent. Is there a way I can check my ignition coil with a multimeter or something? I have no clue what reading I should be getting or what I’m doing to be honest. Any help would be appreciated. I’ve cleaned the contacts and am wondering if the boot is just bad or my plug is bad.