If the car was surging during the .7-1+v readings, then that is about right. If it was not surging, then that variance does not sound right and could indicate a sensor problem. Don't just look at the sensor wire to see if it "looks" clean or not, a quick alchohol cleaning will tell you for sure if it's dirty or not.
Here is the stock transfer curve to look at regarding the .7-1+v readings - shows flow variance of about 15-20kg. Your may be similar.
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Tom (Torque) Moss
88Gt 5spd Vert, FLowmaster Catbacks, stock cam advanced 4° @ 108.5° ICL, NMRA prepped GT40P heads 1.85/1.55 valves and 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake (ported lower), TB and injectors. 277RWHP/330RWTQ (SAE).
http://www.fastlanecars.com/
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