02-17-2008, 08:03 PM
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#2 (permalink)
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Batman Junior
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
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The main reason the mileage went down in '95 and up is because the body style changed, and the cars got significantly heavier.
I doubt there's any difference between the '94 ECU and the '95 ECU. In '96 the cars got OBDII, that's where the biggest difference would be seen.
Here's my advice:
Keep the '99 ECU specifically because it will permit you to use a ScanGauge in the vehicle (the SG requires an OBD2 computer). Using a ScanGauge to fine tune your brain and right foot will reduce your fuel consumption dramatically more than any ECU swap you could possibly make!
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