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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

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Old 03-20-2011, 03:43 PM
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lmd91343 lmd91343 is online now
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MPG gauge

I've been looking to get an MPG gauge for my truck but the only ones available are for 1996 or later vehicles. However I found out about the mpguino device and wanted it for my truck

I have installed and calibrated the mpguino MPG gauge in my '89 F150 302! It reports on:
  • instantaneous MPG
  • tank MPG
  • trip MPG
  • gallons per hour (to 1/100)
  • speed (digital speedometer to 1/100)
  • distance (to 1/100)
  • idle time
  • idle gas
  • and more

I found out about this device on the eccomodder site. From there I found an installation on an '95 Bronco 5.0 on the FSB site. I don't know if this site allows links. A fellow named Josh there did the install. His post was helpful, however he mistyped the VSS distance constant by over a factor of 12. I'll review my install and use here.

Already I have changed my driving habits a bit for in city driving. My last few drives I have been getting 19.8 MPG! Don't get too excited. I got a 1 mpg bump for the MAF upgrade and another 1 mpg increase for the MSD 6a box/new coil/regapped plugs/MSD wires. So the driving changes are worth about 3 mpg. I hope to improve more practice as time goes by.

Here is the device installed in my truck:
Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

The color in the photo is a bit off. I used a polarizer for the shot. The paint looks a little more purple through the polarizer.

I attached it to a cell phone holder stalk that sticks to the windshield with a suction cup.

The installation is simple. There are four wires to hook up:
  • constant, not switched 12v+ power (radio memory supply wire)
  • ground (dashboard support bracket)
  • vss (dark green with white stripe on cruise control computer )
  • injector (non-common from any injector, I don't know the color, I rewired my harness with MAF upgrade)

The calibration consists of entering three values in the set screen:
  • vss click count per mile
  • microgallons of gas injected per second
  • injector delay after start of injection signal

I will report on the values I used next time I go outside to my truck. The values are written down on the paper in my glovebox. It is pouring now! (it never rains in california?)

Calibration involves checking actual distance travelled (known course) against the Mpguino reported value and adjusting the VSS constant. Don't use your odometer. It could be wrong. In the SF Valley part of LA, the main streets are on EXACT 1/2 mile intervals. They are on old T&S survey lines from our agricultural past. The injector value is modified by gallons dispensed at the pump during fill-ups. A simple calculation with a calculator and you have modified value to re-enter. A couple of runs and I was almost perfect. The third value is the delay in microseconds from the arrival of the electric signal and start of the gasoline delivery. I have mine set to .000005 seconds. Most folks have it set at .000072 seconds. That means on long hard accelerations I might over report the gasoline used by a bit.

The gauge was $55. The project box was $6. The (red not red/purple) paint was $5. The cell phone holder was $10. The telephone cable for hook-up was $2.

I hope this helps with coping with the current gas price rise. ($4.19/gallon last fill up)

Here is the ecomodder site: OpenGauge / MPGuino FE computer - Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com
Here is where I bought it: http://opengauge.org/mpguino/
Here is the Mpguino wiki page for installation and calibration info: MPGuino - EcoModder

Hope this helps.
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1989 f150 302 Lariat
MAF conversion; MSD 6a; MSD Blaster 2 coil; 3G alternator; insulated 460 intake tube; sound proofed; 3rd brake light; custom leather seats; low fuel light; instant mpg gauge; reupholstered door panels; tach install; "A" pillar gauges; Truxedo Lo-Pro color keyed to paint; back up monitor in r v mirror
2009 Escape Hybrid 2.5L 35.5 MPG in town!

Last edited by lmd91343; 03-20-2011 at 05:12 PM. Reason: changed cc "motor" to "computer"
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Old 03-20-2011, 04:06 PM
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wow this is the coolest mod I have seen in a while. Thanks for all the information, a very nice investment.
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Old 03-21-2011, 01:19 PM
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Here are my two setup values:

VSSpulsepermile 15065 (1:3.55 diff, 28 inch tires)

MicrosecGallons 153191733 (8 cylinder, 19 lb Ford racing injectors)

You can use these as starting points with stock size tires, injectors, and 3.55 diff. If you don't have those, use a simple algebraic ratio to get your value.

It's simple. If you need any help, just ask.

We need to save gas for our own pocketbooks and an independent foreign policy.
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1989 f150 302 Lariat
MAF conversion; MSD 6a; MSD Blaster 2 coil; 3G alternator; insulated 460 intake tube; sound proofed; 3rd brake light; custom leather seats; low fuel light; instant mpg gauge; reupholstered door panels; tach install; "A" pillar gauges; Truxedo Lo-Pro color keyed to paint; back up monitor in r v mirror
2009 Escape Hybrid 2.5L 35.5 MPG in town!
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Old 03-21-2011, 02:00 PM
Eddiec1564 Eddiec1564 is offline
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I have been looking at the mpguino device for a while now, just haven't fully been motivated to get it. Guess I'll get one too!

Looks good where you have yours. I'm going to install mechanical guages and thinking about making up a gauge pod right on top of the dash.

I did try the a factory Ford MPG/clock unit from a older 5.0 Merc/Lincon car, but the trucks did not have the fuel out line programmed in to the ECU( I installed the wiring for it).
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Old 03-21-2011, 02:55 PM
xc4jokestomper xc4jokestomper is offline
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this is deffinately a mod i would like to do! the only reason i wish my truck was newer was so it would be obd2 so i could get all the super cool scanners and gauges lol.

how did you go about making that box? or did you buy it?
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1995 F150 Supercab Flareside: 302ci, 4r70w, 4x4, 3.55ls, 3rd owner, 100k miles

Current mods: 31x10.5, rear roll pan, Smoked Headlights, FM 40 si/do, Superlift leveling kit,

Future mods: shift kit, true duals, 8k hid's, DIY tonneau cover, Electric fan
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Old 03-21-2011, 04:04 PM
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The project box I bought from Fry's electronics for about $6. I made a cardboard template that matched the size of the Mpguino board and tried that with all the project boxes. I made a few measurements and cut the opening with an exacto knife. I drilled the button holes with a 1/8 bit, using my fingers, not a motor. I got satin finish plastic paint at the hardware store. I got a windshield mount cell phone holder and attached it to the back.

Radioshack has project boxes too, but they are ugly.

I also wish my truck was ODB2 also for the same reason.

This also monitors the speed. You can display a digital speedometer! But why?

Quote:
Originally Posted by xc4jokestomper View Post
this is deffinately a mod i would like to do! the only reason i wish my truck was newer was so it would be obd2 so i could get all the super cool scanners and gauges lol.

how did you go about making that box? or did you buy it?
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1989 f150 302 Lariat
MAF conversion; MSD 6a; MSD Blaster 2 coil; 3G alternator; insulated 460 intake tube; sound proofed; 3rd brake light; custom leather seats; low fuel light; instant mpg gauge; reupholstered door panels; tach install; "A" pillar gauges; Truxedo Lo-Pro color keyed to paint; back up monitor in r v mirror
2009 Escape Hybrid 2.5L 35.5 MPG in town!
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Old 03-21-2011, 04:09 PM
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I've been wanting the Mpguino for over a year. When I saw where the gas prices where going, I pulled the lever. I've picked up over 3mpg by watching the gauge. That's a lot of extra miles per tank.

Quote:
Originally Posted by Eddiec1564 View Post
I have been looking at the mpguino device for a while now, just haven't fully been motivated to get it. Guess I'll get one too!

Looks good where you have yours. I'm going to install mechanical guages and thinking about making up a gauge pod right on top of the dash.

I did try the a factory Ford MPG/clock unit from a older 5.0 Merc/Lincon car, but the trucks did not have the fuel out line programmed in to the ECU( I installed the wiring for it).
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1989 f150 302 Lariat
MAF conversion; MSD 6a; MSD Blaster 2 coil; 3G alternator; insulated 460 intake tube; sound proofed; 3rd brake light; custom leather seats; low fuel light; instant mpg gauge; reupholstered door panels; tach install; "A" pillar gauges; Truxedo Lo-Pro color keyed to paint; back up monitor in r v mirror
2009 Escape Hybrid 2.5L 35.5 MPG in town!
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Old 03-21-2011, 04:20 PM
xc4jokestomper xc4jokestomper is offline
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So it shows u the gas mileage ur getting at the very moment while driving down the road depending on ur conditions?
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Old 03-21-2011, 06:52 PM
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lmd91343 lmd91343 is online now
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Yes. At that second, the mpg of that second.


Quote:
Originally Posted by xc4jokestomper View Post
So it shows u the gas mileage ur getting at the very moment while driving down the road depending on ur conditions?
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1989 f150 302 Lariat
MAF conversion; MSD 6a; MSD Blaster 2 coil; 3G alternator; insulated 460 intake tube; sound proofed; 3rd brake light; custom leather seats; low fuel light; instant mpg gauge; reupholstered door panels; tach install; "A" pillar gauges; Truxedo Lo-Pro color keyed to paint; back up monitor in r v mirror
2009 Escape Hybrid 2.5L 35.5 MPG in town!
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Old 03-21-2011, 06:57 PM
xc4jokestomper xc4jokestomper is offline
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thats sweet!! this deffinately just got moved up on my priority list!
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1995 F150 Supercab Flareside: 302ci, 4r70w, 4x4, 3.55ls, 3rd owner, 100k miles

Current mods: 31x10.5, rear roll pan, Smoked Headlights, FM 40 si/do, Superlift leveling kit,

Future mods: shift kit, true duals, 8k hid's, DIY tonneau cover, Electric fan
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Old 03-21-2011, 07:54 PM
StumpPullerF1 StumpPullerF1 is offline
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Hey joke i have a 96 with a digital gauge thing and its nothing to be jealous of. It doesnt have that many gauges to view like the newer cars do. Just thought i'd make you feel better bought not having a obd2.
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Old 03-27-2011, 12:05 AM
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Milwaukee1979F150 Milwaukee1979F150 is offline
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Have you try add vacuum gauge to help you keep light on gas pedal possible?
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Currently drive 2000 f350 7.3L XL 4wd auto. mpg vary 15-17.

1999 F250 5.4L 2wd 5.4L auto with over 246K miles. Got used 5.4L with 100K miles. Need find motivation to install 5.4L.
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Old 03-27-2011, 12:23 AM
Bankrupter Bankrupter is offline
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Way cool thread. Very well written and laid out THANKS ! This will show me what Im burning plowing for the city too (or parked under that bridge hiding from the city formen) Looking into it forsure ~

+Rep and 5 star thread rating
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Old 03-27-2011, 07:58 AM
xc4jokestomper xc4jokestomper is offline
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I want a vacuum gauge as well. Just not sure where i want to put it
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Old 03-27-2011, 08:13 AM
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Quote:
Originally Posted by xc4jokestomper View Post
I want a vacuum gauge as well. Just not sure where i want to put it
I put on end of driver side on dashboard near cab It work for me.

Vacuum Gauge would help you improve little but try doing in rush traffic worst.
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Currently drive 2000 f350 7.3L XL 4wd auto. mpg vary 15-17.

1999 F250 5.4L 2wd 5.4L auto with over 246K miles. Got used 5.4L with 100K miles. Need find motivation to install 5.4L.
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Old 03-27-2011, 08:13 AM
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