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99 B16A2 Swap Issues

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Old Apr 22, 2017
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Post 99 B16A2 Swap Issues

Hey everyone, I've actually recently just done a b16a2 engine swap on my 1999 Honda Civic Sedan.
Everything has been running very smooth, however I've come to realize that I have been getting very poor has mileage.
On my last fill up for around 43 Litres, I only got out 370KM out of that. That too with a fairly light foot and efficient driving.
I've seen other people post how much MPG they are getting and they're getting around high 20s to 30s. For sure I should be getting around mid 20s.
I've yet to attach the secondary O2 sensor and am running the stock ECU for my D-Series motor right now.
Could those things be the issue to my poor fuel mileage?
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Old Apr 23, 2017
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Re: 99 B16A2 Swap Issues

Brakes seized?
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Old Apr 23, 2017
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Re: 99 B16A2 Swap Issues

No, it can't be the brakes because I've just related them recently
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Old Jun 2, 2017
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Re: 99 B16A2 Swap Issues

I think the B16A2 engine gets less km per litre than the D-series engine you're replacing, but it should be a bit more than what you're describing. I think I get 400 - 415 km per full tank, which I think is 45 litres.

Are you driving in lots of hilly terrain? Is your fuel filter good? Tires at the correct psi? Air filter clean?

Last edited by Delicieuxz; Jun 2, 2017 at 03:45 PM.
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Old Jun 7, 2017
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Re: 99 B16A2 Swap Issues

Maybe with the ecu and O2 you are running rich and dumping too much fuel?
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