Graham BPT Posted January 13 Report Share Posted January 13 Hey everyone - I work with a lot of Subarus on the G4X plug-in ECUs. Most of the time, I can do a full APS and E-Throttle calibration and then have good and normal idle control where an idle position of 1-3% at full operating temp will idle the car nicely, right on target but from time to time, I have some cars that idle too high, say around 1000 to 1100 with a 900 rpm target even as the idle base position is allowed to go down to zero. TPS will be 4.5-5% and won't come any lower so the idle stays high. What I can seem to do to work around this is go into the TPS (Main) closed voltage and lower the voltage down and that will cause the ECU close the throttle more and bring idle down but this seems like a work around rather than the correct way to handle this. So, I'm wondering if there's something I am missing or a better way to deal with this. Is there something that limits the TPS position at idle? I'm wondering why and idle base position of zero can't/doesn't result in a lower TPS opening to bring idle lower? Thanks! Quote Link to comment Share on other sites More sharing options...
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