MicroSquirt.com read only forum (Jan.15,2018)

Can you use two O2 wideband sensors with the Microsquirt?

yes

newtyres1 wrote:yes

OK thanks.
I'm reading the wiring page, and I can only see one O2 sensor wire. Pin 34

How do you connect the second sensor?

According to the schematics Dec 07 there is a spare ADC input on pin 29.

ah I see it thanks
I'm now looking at MegaTune 2.25p3, how do you set that pin29 to be used for the second O2 sensor please?

It cannot be set with standard Microsquirt code, it can be set with MS2-Extra microsquirt code.

newtyres1 wrote:It cannot be set with standard Microsquirt code, it can be set with MS2-Extra microsquirt code.

oh right, I didn't know there was a 'MS2-Extra microsquirt code' available.

You can use a second WBO2 with the normal microsquirt code. The second unit goes on pin 29. The code automatically looks for it on that pin which goes to the spare ADC (ADC6). You just have to specify the dual WBO2 option in the same menu as for specifying NB or WB. When you do, the second O2 had better be on that pin. That pin is also used for a separate barometer sensor, so you can't have both. This is the same setup as on the regular MS2, V3 board.

grippo wrote:You can use a second WBO2 with the normal microsquirt code. The second unit goes on pin 29. The code automatically looks for it on that pin which goes to the spare ADC (ADC6). You just have to specify the dual WBO2 option in the same menu as for specifying NB or WB. When you do, the second O2 had better be on that pin. That pin is also used for a separate barometer sensor, so you can't have both. This is the same setup as on the regular MS2, V3 board.

Brilliant thanks Grippo

Would having a dual O2 system helps?
My engine: V8, twin exhaust, autonomics throttle body with 4 injectors.