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Leafy · 01-21-2013, 08:51 AM

Oscillating idle afr is normal. It'll also do it in cruise. This is how closed loop systems work. But it shouldnt mess up your idle. I would just check for vac leaks and post maf leaks before going back and making your tuner fix it.

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01-21-2013, 08:51 AM	#4
Leafy Scooby Newbie Member#: 330625 Join Date: Aug 2012 Chapter/Region: NESIC Location: MA Vehicle: 2006 WRX WRB	Oscillating idle afr is normal. It'll also do it in cruise. This is how closed loop systems work. But it shouldnt mess up your idle. I would just check for vac leaks and post maf leaks before going back and making your tuner fix it. * Registered users of the site do not see these ads.