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Old 02-15-2012, 09:12 PM   #4 (permalink)
cbaber
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Join Date: Feb 2012
Location: Missouri
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Lean and Mean - '98 Honda Civic HX
Team Honda
90 day: 46.69 mpg (US)
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You should have a 5 wire. Make sure "D16Y5" is stamped on the block. Also, re count just to make sure.

Also, a scangauge is not your best friend with this car. It will not be as accurate as with a standard engine car. Your HX has a lean burn engine, which changes the air/fuel ratio during light driving loads so that you get better gas mileage. Since the scangauge and other products measure MPG using a fixed air/fuel ratio in their calculations they cannot account for lean burn mode and will give you inaccurate readings. To fix this issue MPGuino was developed which measures MPG differently. This is what you want on an HX or VX.

50 MPG with the CVT will be very hard. Depending on how much effort and money you want to put into the car, I would consider changing the CVT to a manual. It has been done before and I believe there is even a writeup on it somewhere out there. You can easily get 35-40 though. Heck, my HX with one cylinder not having compression got 32 mpg on my last tank.
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1998 Honda Civic HX - My Project Thread

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