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Where is AIR divert in 8746 ($61)?

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Old Mar 20, 2010 | 11:25 AM
  #1  
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ldp
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Where is AIR divert in 8746 ($61)?

I'm used to tunig my '730 but this is the first time I'm working on an 8746 ECM (helping out a fellow member).
We could not find the AIR divert constants in the bin file, using TunerPro. Does the $61 XDF file not have them? From searching here, I get the feeling that they are somewhere in there but I didn't find the exact offsets and translation info.

If anybody has this information, it would be greatly appreciated and I'd update and post the new XDF afterwards.
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Old Mar 20, 2010 | 01:02 PM
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Re: Where is AIR divert in 8746 ($61)?

These are the calibration entries. Although I never went through them to see what did what.

Code:
;----------------------------------------------
; 
; AIR
; 
;----------------------------------------------

LD499:	FCB	  2	; timer val

LD49A:	FCB	  1	; major loop O2 filter coef, for L003C

LD49B:	FCB	161	; O2 val, 699mV
LD49C:	FCB	 65	; O2 val, 282mV
LD49D:	FCB	 50	; timer val
LD49E:	FCB	164	; scaled rpm val
LD49F:	FCB	 20	; counter/timer val, in L0077

LD4A0:	FCB	  8	; map val, 22.5 Kpa
LD4A1:	FCB	 80	; delta map val, 25 Kpa
LD4A2:	FCB	199	; coolant thres, 20c
LD4A3:	FCB	 50	; timer/counter for L0078
LD4A4:	FCB	  0	; timer/counter thres for L0079
LD4A5:	FCB	 96	; coolant thres, 67c
LD4A6:	FCB	255	; map thres
LD4A7:	FCB	255	; rpm / 25 val, 6375
LD4A8:	FCB	 38	; rpm / 25 val, 950 rpm
RBob.
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Old Mar 20, 2010 | 04:31 PM
  #3  
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ldp
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Re: Where is AIR divert in 8746 ($61)?

Thank you very much, RBob, this is what I was looking for.
The TunerPro XDF file for $61 doesn't cover the 0x43D-0x4B5 range so it doesn't surprise me that I didn't find it in there.

Would anybody happen to know the calculation constants to translate the raw values into desired real-life values (temp, mV etc)?

Thanks!
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Old Mar 23, 2010 | 07:33 PM
  #4  
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Re: Where is AIR divert in 8746 ($61)?

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