whats a good A/f and knock tool,,,,, sensor ??????????????? I know HKS makes one but whats out there other then that, HKS is kinda costy....

 

As far as Knock Sensors go, I'd just buy evoscan or download Mitsulogger and start logging. For and A/F people have had success with a number of units including the Zeitronix ZT-2, Innovative LC-1, AEM UEGO, PLX etc. Browse around in the ECUflash forum for more info