Idles are ECU controlled, and from experience it's possible to have some supremely odd results on a standalone ECU when it comes to idles. Always worth going over the pipework first and having a look for any leaks. If you've still got a stock ECU there swap it in and let it warm up to idle, see if it still does it. That'll tell you fairly quickly if you need to go rummaging in ECU settings.Originally Posted by Stu
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