Jump to content





Welcome to Ford Fusion Hybrid Forum


Sign In  Log in with Facebook

Create Account
Welcome to Ford Fusion Hybrid Forum, like most online communities you must register to view or post in our community, but don't worry this is a simple free process that requires minimal information for you to signup. Be apart of Ford Fusion Hybrid Forum by signing in or creating an account.
  • Start new topics and reply to others
  • Subscribe to topics and forums to get email updates
  • Get your own profile page and make new friends
  • Send personal messages to other members.
 
Guest Message by DevFuse

Posted Image
Register your Fusion Hybrid at the official Ford authorized registry here.


Photo
- - - - -

Fuel gauge discrepancies


Best Answer acdii , 22 January 2014 - 02:53 PM

Source of discrepancy found!  I finally got around to documenting the trip screen prior to shut down and after startup.  

 

When I got to work this morning, I took a picture of Trip 2 moments before shutting the car off so I would have a record of run time, and fuel used.  I had forgotten to take the picture, so I started the car without the brake being pressed, so reason for CEL. 

 

1502811_662214680487336_1215283833_o.jpg

 

When I went out to lunch, I had remote started the car, called my wife to let her know I was on my way to get her, then noticed the snow on the car and proceeded to clear the snow. By the time I got in the car ready to start it(did not check to see if it would start without pressing the brake(sorry different thread)), it had been running for at least 5 minutes or more.  I had the camera ready and as soon as I pressed the button, and the screens cleared, took another picture.

 

1606491_662214683820669_500781596_o.jpg

 

So it appears that remote start run time is not accounted for, nor is fuel used during that time.   This would explain the gallon and a half difference between what the trip said was used and what was actually put in, and also explains why the fuel gauge and DTE doesn't correlate with reported MPG.   Going back to the PDF posted in another thread on how the Fuel gauge is used, this makes perfect sense now.   It doesn't explain why an apparently empty tank only takes 11 gallons, which I still believe is just a calibration issue between the fuel sender and the PCM. 

Go to the full post


  • Please log in to reply
27 replies to this topic

#21 OFFLINE   acdii

acdii

    Fusion Hybrid Legal Resident

  • Fusion Hybrid Member
  • 8,174 posts
  • Region:U.S. Great Lakes
  • Location:Harvard
  • Current Vehicle:2013 HyTi, 2013 Flex EbTi
  • My Hybrid's Year:2013

Posted 22 January 2014 - 02:57 PM

Pinning topic, and will leave open for comments, but will eventually lock so it doesn't run off tangent.  Pretty sure this solves a big question that has been going around on many levels, including MPG with and without RS. 


Drive Smarter, Not Faster

Posted Image
https://www.facebook.../12595DesertRat







Lose this advertisement by becoming a member. Click here to create a free account.


#22 OFFLINE   hybridbear

hybridbear

    Fusion Hybrid Fanatic

  • Moderator
  • PipPipPipPipPip
  • 4,915 posts
  • Region:U.S. Northern Plains
  • Location:Minneapolis, MN
  • Current Vehicle:2013 Focus Electric, 2013 Fusion Energi Titanium
  • My Hybrid's Year:2013

Posted 22 January 2014 - 04:28 PM

This sounds like an error in the code and should be reported through Ashley. It doesn't explain why owners without remote start (like us) have been seeing big gaps in the extreme cold either.

Current Vehicles

2013 Ford Fusion Energi Titanium - White Platinum Metallic

2013 Ford Focus Electric - Ice Storm

315692.png

 

Previous Vehicles

2013 Ford Fusion Hybrid SE x2

252543.png167422.png


#23 OFFLINE   acdii

acdii

    Fusion Hybrid Legal Resident

  • Fusion Hybrid Member
  • 8,174 posts
  • Region:U.S. Great Lakes
  • Location:Harvard
  • Current Vehicle:2013 HyTi, 2013 Flex EbTi
  • My Hybrid's Year:2013

Posted 22 January 2014 - 09:39 PM

1.5 gallons difference with 4-5 remote starts of under 10 minutes also sounds kind of thirsty too, but does explain the larger difference I am seeing. Usually its within 3/4 of a gallon on each fill.  Not saying it is THE answer, but for me it explains the larger than usual differences I am seeing now on my car.

 

The main point I discovered here, and why I pinned it. If you use remote start, it is NOT calculated into fuel used, nor time run on your trip #1 & #2. This also shows that Remote Start is not factored into your averages when you shut off the car.

 

I am calling it, the RS Blackhole!


  • corncobs likes this
Drive Smarter, Not Faster

Posted Image
https://www.facebook.../12595DesertRat

#24 OFFLINE   FFH834

FFH834

    New Member

  • Fusion Hybrid Member
  • 1 posts
  • Region:U.S. Pacific Coast
  • Location:Southern California
  • Current Vehicle:Fusion Hybrid Titanium
  • My Hybrid's Year:2014

Posted 23 January 2014 - 01:16 AM

Let me start by saying I have a two month old 2014 HyTi with 4500 miles on it and I have filled the tank 10 times now.  I see the same fuel gauge discrepancies as everybody else.

 

1. Cold weather isn't the problem.  I'm in Southern California and for a month in my area the daytime temps have been in the 70's and 80's.

 

2. I have used remote start 3 times since I have had the car, each time less than a minute.

 

Now for my opinion.

 

acdii you partially solved some of my discrepancies and gave me a theory when I viewed your photo in post #4.  I had never seen my fuel gauge display over "Full".  When I saw your photo I said "the next time I re-fuel I'm going to continue adding fuel after the second fuel nozzle click off".  Usually if I stop fueling at the second click the fuel used indicator and the gas station pump are within .5 of gallon.  But this time I added more than a gallon difference for a total of 12.84 gallons! (I had driven until the gauge wasn't even showing red.)  After this fill up my fuel gauge was above full like yours in post #4.

 

OK so here comes the meat of my story.

 

On the next fill up I went to a different gas station than the previous fill. (I alternate between the same two gas stations on my work commute. One in my home town and one near work.)  The fuel gauge had just turned red but I had to force in 11.11 gallons after 4 click offs!  That did not seem right to me as the fuel used indicator was showing 11.35.  The fuel gauge was NOT past full after this fill up.  Alright so the next day when I started to work, after just 15 miles my fuel gauge was showing a black space below full!  After 48 miles the fuel gauge was at 3/4 full!  My conclusion was, at this gas station in my home town, the car must not be on level ground AND THE FUEL TANK ISN'T BEING FILLED TO CAPACITY EACH TIME. (Caps for emphasis and not yelling)  Didn't I read somewhere that the Fusion fuel filler doesn't enter at the top of the fuel tank?

 

So IMO the discrepancy exists because the fuel tank isn't being totally filled after each re-fuel.  Examples:

 

Tank A - Assumed full tank.  Total miles driven - 430.  Fuel Indicator - 11.5 gallons.  Actual fuel added - 11.5 gallons.

 

Tank B - Assumed full tank (Added 11.5g from above).  Total miles driven - 430.  Fuel Indicator - 11.5 gallons.  Actual fuel added - 11.0 gallons.

 

Tank C - Assumed full tank (Added 11.0g).  Total miles driven - 430.  Fuel Indicator - 11.5 gallons.  Actual fuel added 12.5 gallons.  (Why?  Because Tank "B" wasn't really filled to capacity).

 

Tank D - Actual full tank! (Added 12.5g). Total miles driven - 430.  Fuel Indicator - 12.0 gallons.  Actual fuel added 10.8 gallons. (Either the car isn't level and the tank isn't full AND/OR you stop at the first or second click and that isn't filling the tank either).

 

Remember the fuel used indicator is clueless as to how much fuel is actually in the tank.  You could drive 50 miles and then reset the Trip Mileage and that would mess up your fuel used.  Therefore I take the fuel used indicator as a close "estimate" and not necessarily an "exact" fuel used.  You discovered that with your remote start findings.  Here's a test.  Does the fuel used indicator increase if the ICE is running but the car isn't moving regardless of remote start?  I haven't really took notice if it does.

 

Needless to say the odd fuel filler design, the strange "all over the place" fuel gauge, and the fuel used "estimate" make for some stressful times in knowing how much fuel is really left in the tank.

 

Hopefully what I wrote is understandable and sounds reasonable.

 

 


  • hybridbear likes this

#25 OFFLINE   hybridbear

hybridbear

    Fusion Hybrid Fanatic

  • Moderator
  • PipPipPipPipPip
  • 4,915 posts
  • Region:U.S. Northern Plains
  • Location:Minneapolis, MN
  • Current Vehicle:2013 Focus Electric, 2013 Fusion Energi Titanium
  • My Hybrid's Year:2013

Posted 23 January 2014 - 07:49 AM

The DTE and dash fuel gauge are based on measuring fuel in the tank. These are better predictors than looking at your fuel used on trip 1/2. If you want a more precise reading of how much fuel is left in the tank then use Engineering Test Mode.

Current Vehicles

2013 Ford Fusion Energi Titanium - White Platinum Metallic

2013 Ford Focus Electric - Ice Storm

315692.png

 

Previous Vehicles

2013 Ford Fusion Hybrid SE x2

252543.png167422.png


#26 OFFLINE   acdii

acdii

    Fusion Hybrid Legal Resident

  • Fusion Hybrid Member
  • 8,174 posts
  • Region:U.S. Great Lakes
  • Location:Harvard
  • Current Vehicle:2013 HyTi, 2013 Flex EbTi
  • My Hybrid's Year:2013

Posted 23 January 2014 - 01:58 PM

 I always fill at the same pump at the same station at the same flow setting, and usually go about 1/2 gallon over, which happened to be true on all the cars I had that have the gallons used summary.  The gallon more than normal is what prompted me to write this thread as it was unusual. Once I saw that runtime/fuel use is not factored in when using remote start, then my question is resolved. 

 

Has anyone found out if this tank has a Bladder in it like the Prius? If it does, then that would answer the filling question.

 

The lack of being able to fully fill the tank to capacity is another issue and has it's own thread, so lets not discuss that here. 


Drive Smarter, Not Faster

Posted Image
https://www.facebook.../12595DesertRat

#27 OFFLINE   Leon1972

Leon1972

    New Member

  • Fusion Hybrid Member
  • 15 posts
  • Region:U.S. Southern Atlantic
  • Location:Georgia
  • Current Vehicle:2015 Ford Fusion hybrid titanium
  • My Hybrid's Year:2015

Posted 02 December 2015 - 05:30 PM

Here's a correlation between miles driven and the amount of gas used. Doesn't seem to add up to me. 30 miles on gas and over 1/4 tank used? Does this look right to everyone else?

F7DA2784-853E-42D6-AD4B-CFA18A2AA63A.jpg

#28 OFFLINE   Hybrider

Hybrider

    Fusion Hybrid Enthusiast

  • Fusion Hybrid Member
  • 407 posts
  • Region:U.S. Mountain
  • Location:AZ
  • Current Vehicle:2014 Awesome FFH SE
  • My Hybrid's Year:2014

Posted 03 December 2015 - 03:19 PM

That all depends on when Trip 1 was reset, and how full the gas tank was at that time.

 

But 45.7 MPGs looks pretty darn good to me, and the percentage of EV to ICE miles (65.1 / 97.1 = 67%) looks real good. :shift:


  • GrySql likes this

2014 Ford Fusion Hybrid SE Ingot Silver (Appearance Package)

Ordered: 01/07/2014 | VIN assigned: 01/14/2014 | Window Sticker: 02/05/2014 | Build Date: 02/12/2014 | Arrived at Dealer: 02/25/2014 | Delivered: 02/27/2014





0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users

Privacy Policy Terms of Service ·