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David,
Thanks for the info.
Richard,
The attached image came from an RX8 service manual. It appears that the front O2 sensor heater is connected on one side to battery voltage (12-14V) and the other side is grounded through a transistor in the ECU. The sensor is shown as a heating element
and a resistor in series implying that the current may be self limiting and the ECU is just turning the heater on or off. I haven't tried connecting the O2 sensor this way so I can't promise that my interpretation is correct.
Steve Boese
RV6A, 1986 13B NA, RD1A, EC2
From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of Richard Sohn [res12@fairpoint.net]
Sent: Tuesday, February 26, 2013 10:27 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: O2 Sensor data, Steve B.
I am planing to use an O2 sensor from a 2009 Renesis on my test engine. Does anyone know what the heater supply is? I am measureing 2.4Ohm, cold. Probably 5V? The connection is coming out of the ECU.
Would appreciate any info on that.
Still having issues with the mixture setting on the Rotec TBI (Ellison). No real flying yet, just a lot of crow-hopping down the runway.
Richard Sohn
N2071U
http://www.fairpoint.net/~res12/home.html
Sent: Tuesday, February 26, 2013 8:32 AM
Subject: [FlyRotary] Re: O2 Sensor data, Steve B.
Forgot to say, under diog. for RX8 they call both sensors HO2 not AF. ??? David.
From: hoursaway1@comcast.net
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Tuesday, February 26, 2013 9:29:12 AM
Subject: [FlyRotary] O2 Sensor data, Steve B.
Steve, another update on O2 sensor data,,, for a 2007 RX8 frnt. HO2 sensor is read in mil. Amps,,, 1.0 mil. amp is center point under accell is looking for decrease, under deccell looking for
increase, did not give min.-max. for the high & low that I think could have been useful. David.
From: "Steven W. Boese" <SBoese@uwyo.edu>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Monday, February 11, 2013 9:50:49 PM
Subject: [FlyRotary] Re: Crickets & progress
David,
Do you remember ballpark values for the amps and volts?
Thanks,
Steve
From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of hoursaway1@comcast.net [hoursaway1@comcast.net]
Sent: Monday, February 11, 2013 7:19 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Crickets & progress
Steve, I'm not sure why but when diog. the other day on 07 Mazda 3 for a code P2188, Snap-on scanner shows me amps for pre cat. AF sensor & volts for post cat. O2 sensor & that is how they describe
them in Mitchel Automotive diog. text. Hope this helps in some way. David R. Cook RV6A Rotary.
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