Samurai Supra Posted May 11, 2020 Report Share Posted May 11, 2020 Hi guys. Been getting some strange behaviour on the Supralink & OEM IACV setup I have on my Supra. It was overshooting on cold start to around 2000rpm, I adjusted the base position & changed the min clamp, it has improved to the condition in the attached log. The next issue is a drop in idle base position, then a spike to 2000rpm about 20 seconds into the log. I suspect the valve may be faulty, but want to confirm the settings I have make sense before changing anything. Tune & log attached. Thanks. NUR13253 Tune 20200417 with LC & TC.pclr Log 2020-05-11 2;20;27 pm.llg Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 11, 2020 Report Share Posted May 11, 2020 It looks like the valve is working ok to me, I think the spike in RPM is caused by the idle vale responding to the dip just before it, this is caused I think mostly by the ignition timing fighting the idle valve. Turning on idle ign control will fix this. Also I suggest you do a firmware update as there were some closed loop idle bugs fixes in later versions. Once you have done the firmware update, attach a copy of your tune with the recent changes and I will set up a starting point for idle ign. Booston 1 Quote Link to comment Share on other sites More sharing options...
Samurai Supra Posted May 12, 2020 Author Report Share Posted May 12, 2020 Thanks Adam, will do that update and report back. Quote Link to comment Share on other sites More sharing options...
Samurai Supra Posted May 13, 2020 Author Report Share Posted May 13, 2020 Hi Adam, Updated the firmware, seeing some better behaviour on cold idle. Think I may need to retune the low temp base position, but before I do anything rather you take a look. Latest tune & log attached. Thanks. Log 2020-05-13 7;30;12 pm.llg NUR13253 Tune 202000513.pclr Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 13, 2020 Report Share Posted May 13, 2020 Can you zero out the startup step table, and change your ECU hold power/keep alive time to 10seconds, then log the next cold start. Quote Link to comment Share on other sites More sharing options...
Samurai Supra Posted May 14, 2020 Author Report Share Posted May 14, 2020 Very quick start, only like one crank and she fired up. No overshoot present. NUR13253 Tune 202000513.pclr Log 2020-05-14 8;11;03 pm.llg Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 14, 2020 Report Share Posted May 14, 2020 It doesnt look bad now. Try your minimum clamp at 50 or 55 and it might get to the target a bit quicker in the first couple of seconds. Quote Link to comment Share on other sites More sharing options...
Samurai Supra Posted May 15, 2020 Author Report Share Posted May 15, 2020 Thanks Adam, will give it a shot. Quote Link to comment Share on other sites More sharing options...
Samurai Supra Posted May 18, 2020 Author Report Share Posted May 18, 2020 Hi Adam, getting to target around 2 -3 secs after startup after adjusting min clamp to 50. I'm happy with that setup, will leave it as is. Thanks for the assistance. Quote Link to comment Share on other sites More sharing options...
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