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Owner: CrazyLee
The Beast: 1993 Fleetwood Flair includes kitchen sink
Displacement: 5.7 L
Fuel type: gasoline
Transmission: automatic
Curb weight: 12000 lbs
Coefficient of drag: 1000
Frontal area: 70 sq.ft.
Instrumentation: MPGuino
Description: The Fleetwood Flair is a 26 foot motor home. I was getting 11.8 mpg with a bad O2 sensor. I have replaced that with new. I have gotten lower mileage because of a trip towing a toad. I got 9mpg with that combo.

I have installed an MPGuino fuel mileage meter. I'm in the process of calibration.

I have calibrated it. The trial and error that I did to get it to read was very close. It's neat to actually
stumble on the parameters that work so well the error was almost negligible.
I set Micro/sec/gal at 108507850 to start. Too low, I drove around in a large parking lot. Must have looked silly going in circles! I guessed at 90000000 and that was too high. reset it to 70000000, still too high. Reset it to 40000000. Just right. I set the VSSPulses/Mile to 8000 from ECM to speedo signal.

The VSSPulses/Mile calibrated to 7848, so 8000 was real close. The MicroSec/Gallon came out to 36746215 very close to the 40000000 number i set at first.

Now I'll have to verify it on a long trip.
Anyway 3.58 gallons for 44.56 miles = 12.44 mpg.
Not bad for a 14000 Lb vehicle.
The MPGuino said 14.4 mpg on instant. Very stable.

I installed a JCar module to square up the injector pulses. It works well. I still haven't gotten a good calibration so I'm still relying on actual fuel up numbers.
Build Thread:
Current Mods: K&N air filter
synthetic Valvoline oil
O2 sensor
Drive @ 54 mph

Planned Mods: I'll make up an air dam
Amsoil synthetic differential lube
Amsoil engine lube

I'm looking at a GForce chip.

With the MPGuino it will be easy to test any mod, since it reads out instantly.

http://www.crazycomputers.com/Fleetwood_Flair_26/
Official Fuel Economy Ratings
EPA city 10 mpg(US)
EPA highway 15 mpg(US)
EPA combined 13 mpg(US)

Actual Fuel Economy Performance
Lifetime 8.57 mpg(US)
Last 3 tanks 5.48 mpg(US)
90 days 9.2 mpg(US)
View Fuel Log
Last updated: Aug 13, 2013

(Created: 2011-04-22 20:47:05 / Modified: 2013-08-14 23:25:06)


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