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racprops,
My diesel heats the fuel going thur the injector pump so temperature compensation maybe in order. I have taken my Zemco setup off. If I try to measure again I am going to have a graduated cylinder of fuel in the car and two 2 way valves so that my co-pilot can switch off the car tank and switch on the graduated cylinder over a measured distance. Compensate for temperature and eye-ball the fuel used. Crude but empirical. Kids do not try this at home... your mileage may vary.
On my '91 F250 I simply reduce the voltage to the injectors to lean out the mixture. The computer tries but can't compensate enough to richen the mixture but any approach measuring injector pulse width would be invalid. So i know what your mean about limitations of measuring methods.
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