Another S/C'd member worried about his AFR - Toyota Yaris Forums

LtNoogie · 03-29-2009, 03:07 AM

I thought that Open Loop meant that the ECU was not making adustments to the engine parameters. Like when you are in DFCO. Today when crusing on the freeway, I switched my ScanGauge to show the OPEN/CLOSED loop state of the engine.

Anytime I went into boost, even slight boost, the ScanGauge showed OPEN Loop. If that is true, what would cause the ignition to retard? This is confusing. I could not repeat this on surface streets and boosting lightly.

I'm still working on a new camera mount and will video the gauge cluster and ScanGauge to demonstrate this new mode of operations. Wierd.

03-29-2009, 03:07 AM	#11
LtNoogie View User's Garage Drives: '08 Bayou Blue LB AT Join Date: Oct 2008 Location: West Hills, CA Posts: 2,517	What does Open Loop really mean? I thought that Open Loop meant that the ECU was not making adustments to the engine parameters. Like when you are in DFCO. Today when crusing on the freeway, I switched my ScanGauge to show the OPEN/CLOSED loop state of the engine. Anytime I went into boost, even slight boost, the ScanGauge showed OPEN Loop. If that is true, what would cause the ignition to retard? This is confusing. I could not repeat this on surface streets and boosting lightly. I'm still working on a new camera mount and will video the gauge cluster and ScanGauge to demonstrate this new mode of operations. Wierd. __________________ aFe Intake \| Blitz Supercharger \| Megan Header \| TRD Exhaust \| NST Pulley Set TRD Shocks/Struts \| Tanabe NF210 Springs \| TRD Sway Bar \| Motegi TRAKLITE wheels \| Kuhmo Ecsta XS R1 Concepts slotted rotors \| Carbotech 1521 brake pads \| stainless steel brake lines \| Seibon vented carbon fiber hood

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
AFR running extra rich at WOT?	eTiMaGo	Performance Modifications	15	03-10-2007 12:10 PM