Err...just got a reality check.....
from what I know.. unless you have a wideband 02 sensor installed in your car... the stock sensor is only able to measure a small range.. and if I'm not wrong.. the range is very small
which means that your AFR meter should be reading wrong.. check the manual for the connections.. does it say that it is supposed to be connected to the narrowband sensor? or the wideband type sensor? Wideband is 5V... and narrowband.. well... I forgot.
here's a link..
http://www.pgmfi.org/twiki/bin/view/Library/WideBandO2
now that my memory is refreshed by the above link.. it would seem that the narrowband can only read the range of 14-15 A/F Ratio.. so check again which sensor you're using.
If you're running narrowband.. that's the stock sensor that is on the extractor's end (OBD1/2) or if you're running earlier gens (OBD0), it's on one of the primary bends off the extractor. (stock EF, anyone?)
If you're running a seperate wideband.. it's usually mounted on the straight pipe (where the cat used to be).. since the ECU requires a narrowband... usually people leave the damn thing alone (unless you got those expensive a/f stuff that gives an output to the ecu)
My guess is.. that reading you got wasn't accurate.. or if you spliced the wire off the stock narrowband 02 sensor.. it probably whacked up the readings... both to your turbo timer, and to your ECU..
Then again.. I'm not the one looking at your engine.. have a mechanic take a look and let us know the results.