robrixon Posted January 22 Report Share Posted January 22 I'm after some assistance with an issue with the detected knock level and settings on the Extreme G4X on my 1JZ non-VVTi. My tuner was using an external knock detection box and headphones and confirmed that the engine was not actually knocking on this map. The engine harness uses home runs of M25700 twin core for each Bosch sensor and the shields are drained to ECU B17 along with the Signal negative on both sensors. The front knock sensor Signal pos is going to ECU Knock 1 and the rear is going to ECU Knock 2. I have confirmed polarity and continuity for signals and grounds. Based on the attached log, is this amount of RPM-dependent noise typical (or at least not unusual) and the gain(s) need(s) to be adjusted or do I potentially have a shielding problem? Any help would be great. Knock Testing.llgx JZX90 BTM90 Knock.pclx Quote Link to comment Share on other sites More sharing options...
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