RobGT4Fun Posted April 7, 2022 Report Share Posted April 7, 2022 Good evening, Trying to clean up a few things on my engine. Gen 3 3S-GTE in my Celica ST205. Have idle set and working fairly well... until I turn on AC. Base Idle target is 800 with +50 compensation for AC on but engine revs to about 1200. Cant figure out why at this point. Have no additional fuel enrichments. ICV drops really low; 1% with AC on. The other issue I am running into is intermittent ignition cut under moderate acceleration that are very noticable. And random fuel cuts to 100% on log though have not seen or felt the effects of that going down road. I will have to upload that tomorrow or this weekend as my current log with that data is too large. raz1-adfAFR-wg100-aemcal1.pclx Quote Link to comment Share on other sites More sharing options...
Adamw Posted April 7, 2022 Report Share Posted April 7, 2022 I think possibly the idle valve is working back to front. Is it still the 3 wire valve? In the idle speed control setup try changing the aux 1 active state to low. I just remembered the factory ecu uses an extra air bleed solenoid for the AC idle up. This is connected to Ign 4 which you have set to AC Clutch. As far as I know Aux 6 should be set to AC Clutch. So change AC clutch output to Aux 6 and give it a try Quote Link to comment Share on other sites More sharing options...
RobGT4Fun Posted April 7, 2022 Author Report Share Posted April 7, 2022 I will give that the ol try and see what comes of it. Quote Link to comment Share on other sites More sharing options...
RobGT4Fun Posted April 8, 2022 Author Report Share Posted April 8, 2022 Seemed to do most the trick. Have some rpm fluctuations to sort out. But better result. PC Datalog - 2022-04-7 3;33;31 pm.llgx Quote Link to comment Share on other sites More sharing options...
Adamw Posted April 8, 2022 Report Share Posted April 8, 2022 Turn idle ign on, try something like below. Quote Link to comment Share on other sites More sharing options...
RobGT4Fun Posted April 11, 2022 Author Report Share Posted April 11, 2022 On 4/6/2022 at 10:06 PM, Adamw said: I think possibly the idle valve is working back to front. Is it still the 3 wire valve? In the idle speed control setup try changing the aux 1 active state to low. I just remembered the factory ecu uses an extra air bleed solenoid for the AC idle up. This is connected to Ign 4 which you have set to AC Clutch. As far as I know Aux 6 should be set to AC Clutch. So change AC clutch output to Aux 6 and give it a try Well that worked for idle up control... But Aux6 did not actually engage AC and make it blow cold; Ign4 does. My work-around was take what has been done and remove idle up command from tune. This makes it idle up to about the right RPM (900ish) when AC is turned on. Quote Link to comment Share on other sites More sharing options...
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