HONDA CIVIC MISFIRE in reverse 

Good job Sir. Thank you

Very cool case study. Nicely solved. Do you think it acted up in reverse, but not drive because the harness would press against the firewall grounding the compromised wires when in reverse? Then, in drive the harness would move away from the firewall(moving the compromised wires away from ground) allowing the system to return to normal until the vehicle was put in reverse again?

Good find, nothing suprises me anymore what you can find that someone has done that and caused intermittent problems like this.