Ah, that's some extra clarity, makes a lot more sense now. You might look into the MPGuino (which my mind always reads as "MPGuido," and I think of some Jersey-Shores guy who loves the gym, tanning, and MPGs), I think that works with OBD1 cars. A vacuum gauge would definitely be a good start---if you haven't, look into the instrumentation section. Lots of good suggestions there.
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Nissan Leaf driver? Join me in Team Leaf and feel smugly superior about our MPGe
Current Car: White Lightning
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Retired Car: Betty White
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