Understanding and setting up the MPGunio - Page 2 - Fuel Economy, Hypermiling, EcoModding News and Forum

McTimson · 10-27-2009, 03:33 PM

It must have been reset somehow then. Is it hooked up to the car battery, or something else? And, are you sure you didn't accidentally hit 2 buttons at the same time? Pressing top and middle resets the tank data.

racprops · 10-27-2009, 04:02 PM

Did not hit wrong buttons, am have a slight problem with the battery, it would not start yesterday, just clicked so perhaps that caused a reset?

Rich

McTimson · 10-27-2009, 04:46 PM

Yea, it's possible. Starting the car takes a huge amount of power from the battery, so if it drained all the power and couldn't keep the voltage up near 12V, then the MPGuino could have shut off.

racprops · 10-27-2009, 05:23 PM

Well it was below 10 volts so I hope that is what happend.

Well I am testing the battery and if it does not hold a charge it is a dead lead POS...

And I will need to reset all the tests.

Rich

CoastRider · 11-02-2009, 11:39 AM

I should be receiving a MPGuino by the end of the week! anyone have base line calibration info or know where it can be found? for an 1989 F150 4.9? I have all I need to hook up the pwr grd vss and inj just lost on everything else.

racprops · 11-02-2009, 11:49 AM

Well my 2000 4.6 uses Speed 16000 for the VSS per mile and
0,135,000,000 for mircosec gal.

That should get you going.

I think I posted the defualts and watch out when working though the screens you don't change any...easy to do if you hold the buttone split second too long.

Rich

CoastRider · 11-07-2009, 08:44 PM

Got it today Yippee lol. anyway having a few issues and Have a few questions...

first off it flickers when the engine is running, and it keeps reseting, Tomorrow I'm going to triple check all the connections and whatnot.

racprops · 11-07-2009, 09:28 PM

Mine keeps resetting the Tank miles...

I too will reconnect to see if I can lock it down.

Rich

CoastRider · 11-09-2009, 05:38 PM

WooT WooT

Its good to go now. Just need to work on the calibration some more.

only issue is it doesn't pick up a speed signal till about 10-15 mph... maybe I need to clean the VSS.

I might try using the VSS on the rear axle, the one it's tapped into now is on the transmission right by the speedo.

Thanks again for an awesome product

racprops · 11-14-2009, 10:49 PM

OK Got it locked down now.

OUCH Spoke too soon...

Switch to the Tank Big MPG readout and was driving and she locked up again.

I will now add a blocking diado and filter cap to the incoming 12 Volts.

The meter seems very senstive to voltage bumps.

Two things: a manual would be a big help, seems the trip miles reset with each turn on.

Which is what I am trying to do here, cover details as I learn them and pass them along.

The Tank miles are suppost to stay.

I had mine hooked up to a constant on 12 B+ on a relay I added to power up some add on gauges.

I am guessing there was some little backwards EMF coming off that relay.

Perhaps a little filtering to make them less sentive??

So I hard wired it driecly from the battery, same for the ground, it has not messed up for a couple of weeks.

So looks good.

So anyone done any thing with a TBI Motor like a Chevy 350 TBI??

Rich