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Ed Wright · 08-09-2011, 08:30 PM

It can't switch between tune ups like that. He has something else going on.

Your timing changed because something on the engine moved. Either that or the offset number in your calibration was changed. Charging the battery with the switch left on won't hurt the ECU.

08-09-2011, 08:30 PM	#74
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 389 Times in 168 Posts	Re: Single channel O2 It can't switch between tune ups like that. He has something else going on. Your timing changed because something on the engine moved. Either that or the offset number in your calibration was changed. Charging the battery with the switch left on won't hurt the ECU. __________________ Ed Wright 4156 SS/JA