R24 Posted September 18, 2018 Report Share Posted September 18, 2018 idle setting.docxAfter reading the help file for open loop and closed loop idle, I gave it a try to tune again on open loop from start disabling the ignition idle control. When i start from a cold engine adjusting the idle base, I get unstable idling as it moves up and down constantly with error of between 150 to 250 rpm. this becomes more obvious when the engine reach the 80 degrees C. The idle gets back to normal after I turn on the ignition idle control in open loop. How can I overcome this in order to tune it correctly and move to closed loop tuning. My settings on my car are as below: SARD fuel injector 530cc part no. 63516, deadtime 1.10 ms Fuel pressure set at 40 psi Bosch 3 wire solenoid isc idle setting.docx Quote Link to comment Share on other sites More sharing options...
R24 Posted September 18, 2018 Author Report Share Posted September 18, 2018 My isc setup: Quote Link to comment Share on other sites More sharing options...
JMP Posted September 18, 2018 Report Share Posted September 18, 2018 If the idle is oscillating, I'd look to adjust your base ignition and fuel tables to stabilise it first R24 1 Quote Link to comment Share on other sites More sharing options...
R24 Posted September 19, 2018 Author Report Share Posted September 19, 2018 I tried to increase the ignition timing and fuel at the idle columns and it does stablize a bit. I'll try to do some trial during thw weekends and ill update. Thanks for the heads up JMP. Quote Link to comment Share on other sites More sharing options...
Davidv Posted September 20, 2018 Report Share Posted September 20, 2018 ISCV is too slow to really be useful for quick changes in closed loop, you really need to get your fuel dialled in nicely and then ignition trim is the best way to keep it stable in my opinion. R24 1 Quote Link to comment Share on other sites More sharing options...
R24 Posted September 20, 2018 Author Report Share Posted September 20, 2018 5 hours ago, Davidv said: ISCV is too slow to really be useful for quick changes in closed loop, you really need to get your fuel dialled in nicely and then ignition trim is the best way to keep it stable in my opinion. I had this car tuned 2 years back but im surprised many of the tables and settings were overlooked which can contribute to much more refined driving experience if done well. I'll check on the main fuel table and try again setting in closed loop. Quote Link to comment Share on other sites More sharing options...
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