Quick update on behalf of William Buell...
Willy logged me three sets of data, firstly with the narrow band sensor in the rear (standard), secondly with the narrowband sensor in the front (using the UKBEG headers) and thirdly back to standard with the narrowband sensor in the rear.
Between each log, I updated the relevant map for him in MegaLogViewer. Note that I was concentrating on the CL and CLL areas and filtering everything else out in Excel (anything with an OL correction or WOT correction greater than 100).
Note that I modified the following
MSGraph.properties file line from...
Code:
NB_recommendedCellValueFormula=(cellValue*[Field.egoCorrection]/100*[Field.AFR]/afrValue)+(cellInterpolated*[Field.egoCorrection]/100*[Field.AFR]/afrValue)/2
...to...
Code:
NB_recommendedCellValueFormula=(cellValue*[Field.egoCorrection]/100)+(cellInterpolated*[Field.egoCorrection]/100)/2
...as I am sure we have previously discussed, the MLV correction takes the EGO correction, which the ECM calculates as the correction needed to return to stoich, and the AFR inferred from the measurement of voltage from the O2 sensor (the tuning guide tells you why this is a no no). You only need the EGO correction as the ECM knows that it is doing...
Willy will tell us which sensor he used in the front, in case it was not a standard one, however I am pretty confident it was one I had kicking around the garage which is a pre-08 (larger) type.
The following tables show the percentage increase in fuelling driven by running each log through MegaLogViewer...
Attachment:
File comment: Experiment 1 - % change from base map using data logged with a narrowband on the rear cylinder (first attempt)
001 post rear.jpg [ 102.1 KiB | Viewed 358 times ]
Attachment:
File comment: Experiment 2 - % change from base map using data logged with a narrowband on the front cylinder
002 post front.jpg [ 101.53 KiB | Viewed 358 times ]
Attachment:
File comment: Experiment 3 - % change from base map using data logged with a narrowband on the rear cylinder (second attempt)
003 post rear.jpg [ 101.65 KiB | Viewed 358 times ]
Finally the following table shows the difference between the first remapping of the rear cylinder and hence the importance of repeating logs after remapping, concentrating on getting the engine up to temperature and smooth use of the throttle with lots of time at steady speeds.
Attachment:
File comment: % change from experiment 1 to experiment 3 - rear only
001 to 003 rear difference.jpg [ 42.17 KiB | Viewed 358 times ]
Although we haven't really converged on the perfect map, we have made sufficient change for Willy to feel the difference.
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if bits o kit are fubar 
the only true way then was to remove plugs and check piston crown colour but in them days throttle only had two position 
cant remember who sells the twats in the uk 
, ALL WAYS LOOK ON THE BRIGHT SIDE OF LIFE , 
,as han said in enter the dragon YOU HAVE MY GRATATUDE 
