Lean burn Honda Civic sedan: 93 Civic d15z1 swap into LX 4 door (VLX)

[slownugly]

Got all the brakes fixed. Inspected and tires set to 45 psi all the way around. New synthetic trans fluid. Full tank of gas. She's ready to rock and roll. I have no instrumentation and I'm not doing eoc or pulse and glide. I'm simply going on feeling when lean burn kicks in and out. I'm including a pic of my gas mileage app that shows what the car did towards the end. In warmer weather it averaged low 40s with the d15b7 with 285k on the odo and no eoc. I'm hoping for at least 45mpg on the first tank with the new engine. Once I get used to it I should be able to increase it to 50 wish me luck!!

[slownugly]

Well I'm 300 miles into the first tank and things are looking good. I'm at about 60 percent highway 40 percent city. Only troubles I've had so far are the stumbling o2 sensor and I was getting a tps code #7. I was anticipating this because that throttle body threw the code in the teal car. I put a new sensor on it and adjusted base idle then timing and finally the tps voltage to .49 v at idle. I set the idle to 750 which is 100 more than what the z1 factory spec calls for but with the a/c and power steering i figured it would compensate. Even with these problems I'm estimating about 46-48mpg on this tank.

P.s. I love Honda!! Why they didn't make the z1 available in every model is beyond me. Only certain situations is the extra weight noticeable and this thing coasts fantastically. Plus the sound deadening makes it so much less noisy you can barely hear the engine running because it's such low rpms. With aero mods, instrumentation, a new 02, and better driving techniques this could be a heavy hitter. 50+mpg easily in the summer. Mpg figures to come tomorrow

[California98Civic]

Very nice build. Thanks for sharing. Subscribed.

[slownugly]

Thanks. It's been fun so far, still more fun to come.

[Xist]

Slownugly, does your handle refer to your car? This has been an interesting read, although I have only skimmed--the most that I have done is change an alternator, so I could not understand everything, but it sounds like you have a great project!

[slownugly]

Haha my sig is from another forum. Its poking fun at my AMCs. I've had several Amc pacers and I still have 2 Amc gremlins. I recently picked up a 68 rambler American I started a thread on here but I wanted to get this car done first

I filled up this morning to a disappointing 42 mpg. I'm gona chalk it up to the bad tps reading for half of the tank. Plus the stumbling 02. Oh well. Let's see what the next tank does.

[slownugly]

Filled up again this morning for a little better reading. 44.1 mpg on this tank I'm getting used to the lean burn with the stumbling sensor and I concentrated on staying in lean burn as much as possible. I'm gona order a sensor soon but before I do I wanna try the next tank with some EOC and concentrating on lean burn as much as I can. The goal being a 50mpg tank in the wintertime.

My normal commute consists of 63.5 miles one way to work. I live in one valley and work in another so both ends of the commute involve climbing and coasting large hills/ mountains.

[MetroMPG]

Get an MPGuino - it'll help you tune your right foot a lot to attain & hold lean burn. Also, it'll accurately report your MPG once calibrated, even accounting for lean burn mode (unlike ScanGauge/UltraGauge etc.). Don't underestimate the usefulness of instrumentation in helping you meet & beat your MPG goal!

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AMC nut, eh? I had a Spirit (2wd) - one of my first cars, passed down from a relative. Awful, awful car.

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Going to put the VLX in the EcoModder garage? Your Garage: [ Add new vehicle ]
I'd like to feature the project on the front page.

[slownugly]

Yea I have a mpguino but it's for my Vx hatch. I haven't had a chance to install it yet I just mounted it. I have to buy another one or I was considering a wideband afr gauge.

I'll post a pic of one of my gremlins. It's a drag car project from the 70s that I sadly haven't been able to finish yet. I'm saving to buy a house right now. ( I haven't had it since the 70s I'm only 24)

Yea I'll add it to the garage. Thanks

[slownugly]

And my d15z1 lineup