Fasters Posted February 29, 2020 Report Share Posted February 29, 2020 hi everyone, i want to know how to do if cold temperature (around 20 to 60c) idling steady like same temp at 70c to 90c . im not use stepper motor . i already try to adjust + - at map cold start , post start , warmup enrichment and etc . still same .. and sometimes , i need to tapping little throtle pedal to make idle smooth . when temp is around 65c to 90c idle steady around 1.5k rpm . im using high duration camshaft . Quote Link to comment Share on other sites More sharing options...
Adamw Posted February 29, 2020 Report Share Posted February 29, 2020 Most engines would need the extra air that the idle valve bypasses for an effective cold start fast idle. You may get it good enough using idle ignition control. Set your normal hot idle ignition timing quite low, say 0-5deg, this will allow you to open the throttle a little more to maintain the normal idle speed. Then in the idle ign table, set one axis to ECT and run lots more advance at cold temperatures - say idle at about 20/25deg. Quote Link to comment Share on other sites More sharing options...
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