robrixon Posted July 7, 2022 Report Share Posted July 7, 2022 Based on the testing below and advice from AdamW I don't believe the tacho from my 1JZ-GTE JZX90 requires the resistor mod or external booster, however, I would still value any input on what is going on below. Key on Sweep is working Ignition Off = Displays 1,000rpm Ignition On = Displays 2,125rpm Relationship between signal and needle position is as follows: Playing with multiplier, offset, duty cycle etc appear to have no effect. Next step is to try a GP PWN table I'm guessing? The thread below is a similar situation but to be honest I can't replicate these G4+ settings on G4X as I'm out of my depth in custom PWN tables. Quote Link to comment Share on other sites More sharing options...
Adamw Posted July 7, 2022 Report Share Posted July 7, 2022 If its reading 2000RPM with no signal then you are going to need to fix it first. Quote Link to comment Share on other sites More sharing options...
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