I'm looking at going to look at an 09 Cobalt SS 5 speed LNF it currently has a cylinder 1 misfire the guy I'm buying it from has done coils plugs ACE check the time and he says rings are good but it still has cylinder 1 misfire says it runs and drives under its own power the inner core is not hooked up and it does not have front clip I'm going to go look at it tomorrow and bring a compression tester and a scan tool with me what are some things that I should look for and also if anyone knows the compression ratio that would be