With the use of the Bluetooth obd scanner and torque pro it raises slot of questions since it has a plethora of information regarding your car. Perhaps ignorance is bliss but hearing about the horror stories of LSPI and the wiring harness you can't ignore playing detective. Looking at data logs I see engine knock but only 1 time on 3 trips out of ten. And misfiring it happens every trip but nothing more than 15 on cylinder 2 and 10 on cylinder 3 and a couple on 1 and 4. Am I making myself nuts worrying about insignificant readings? And another thing, why does the boost/ vac. measurement at idle read negative 10? This is all info using apps connected to the obd scanner via Bluetooth.