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the S3 is different in a tiny, yet big way. a returnless fuel system for the big part. its run at a constant 60 psi and has 31.5 # injectors. better flowing supercharger, heads and UIM. other than that, its the exact same. different harness and computer of course. so a S2 info would not work on the fuel side of things.
PPM = pulses per mile. the GM standard that ive seen on a lot of cars is 4000. the stock fiero computer dives it in half... kinda dumb. a lot of gm cars n trucks use the same tranmission.. and in the olden days npt much of it was run off the computer.
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