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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.
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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