Hi everybody. I have problem with rpm readings of 3gen LS1. The problem is that on starter and low idle readings are correct . But on high rpm is mismatch, for example the motor is running around 2k but the tacho reads around 3500 on 4k reads about 6000 rpm . I have selected LS1 3-12 and 5-10, LT1 , multitooth triggers and tried different filtering but there is no change . The car runs smooth afr is constant the only problem is the RPM readings . ecu: Link G4+ atom 4 cylinder wasted spark mode crankshaft position sensor is connected with 5v Power supply .