Hands off EFI throttle

jdaws

I read that durring engine warm-up, the EFI runs in open-loop mode at a 12.0:1 air/fuel ratio. When the temp comes up it goes into closed-loop mode at a stoichiometric 14.7:1 AFR. In high-temp mode the idle drops to 950 RPM and the ECU goes to open-loop mode, richening the fuel mixture to 12.0:1 in an attempt to cool the engine. If you feather or blip the throttle the ECU retreats back to closed-loop mode at 14.7:1 which is too lean. If the bike accelerates past 1200 rpm at idle, the engine will stumble under high heat. This is why an EFI throttle should be left untouched during hot idle. This is for the closed-loop EFI (with O2 sensors) only.

Romain

Thanks for the info. I will refrain from revving up when static.

__________________

Life is too important to take seriously!

smitty901

You are correct. And the high temp mode should not be confused with the parade mode two different things. People often confuse the High temp mode with there being something wrong with the bike.
When sitting at the light do not rev the engine. Last year some were here I posted this information , forgot were I had the copy of it.
The 07's work the same way

__________________
The Infantry leads the way