dic fuel range inaccurate
Thread Starter
Racer
Joined: Jul 2010
Posts: 392
Likes: 3
From: Palm Coast Florida
dic fuel range inaccurate
I have a brand new 2011 C-6 coupe Grand Sport. When I filled the gas tank for the first time the DIC fuel range read 230 miles. After 120 miles I filled it again with the same results. Has anyone else noticed this in accuracy?
Capt Bob
Capt Bob
Race Director
Joined: May 2006
Posts: 12,973
Likes: 1,020
From: SOFLA
2016 Corvette of Year
2015 C6 of Year Finalist
It needs a while to build your average MPG's. It would do the same if you reset your DIC for MPG it will read your current until you get a history of how you drive, it will then average it.
If that makes sense?
David
If that makes sense?
David
Safety Car
Joined: Dec 2007
Posts: 4,974
Likes: 148
From: Magnolia Texas
not sure I understand your issue - 230 miles with a full 18 gallons is only a 12.8 mpg average which is very low. would suggest you have an issue with the computer controlling the DIC and a dealer trip is in order. never seen this topic before.
Melting Slicks
Joined: Jan 2004
Posts: 2,158
Likes: 4
From: Henderson Nevada
If I confiused everyone, or if I'm wrong, sorry....
Melting Slicks
Joined: Nov 2004
Posts: 2,223
Likes: 12
From: "No matter where you go... there you are"...."You cannot drive a dollar bill". ...and remember... "D
Hell 12.8 is pretty good...........LOL
Thread Starter
Racer
Joined: Jul 2010
Posts: 392
Likes: 3
From: Palm Coast Florida
Well the dealer said everything checked out, but there has to be something wrong. I know there are two tanks, so I hope they are both full and not just reading one. The dealer was really busy, but promised to look into it. I just wanted to know if anyone else had the same problem.
Capt Bob
Capt Bob
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Team Owner
Joined: Dec 2002
Posts: 32,074
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From: San Francisco CA
Well the dealer said everything checked out, but there has to be something wrong. I know there are two tanks, so I hope they are both full and not just reading one. The dealer was really busy, but promised to look into it. I just wanted to know if anyone else had the same problem.
Capt Bob
Capt Bob
Burning Brakes
Joined: Oct 2008
Posts: 1,199
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Team Owner
Joined: May 2004
Posts: 82,175
Likes: 1,319
From: McKinney TX
St. Jude Donor '21-'22-'23-'24
Here's some information from the owner's manual.
The fuel economy data used to determine fuel range is
an average of recent driving conditions. As your driving
conditions change, this data is gradually updated
automatically.
If the vehicle has been idling for a long time, the range
displayed on the DIC could be abnormally low. The
vehicle must be driven 8–16 km (5–10 miles) to get an
accurate reading.
an average of recent driving conditions. As your driving
conditions change, this data is gradually updated
automatically.
If the vehicle has been idling for a long time, the range
displayed on the DIC could be abnormally low. The
vehicle must be driven 8–16 km (5–10 miles) to get an
accurate reading.
Team Owner
Joined: Dec 2003
Posts: 57,408
Likes: 164
From: queensbury ny
You will only get that 550 range type mileage if you take a long highway trip.How many miles you have on the car is irrelevant.Around town driving gets you crappy mileage- highway gets you high gas mileage.It's that simple and it's normal too.Mine was up to 400 something when I took my regular trips to the Jersey shore.Now it's 2oo something.19,100 miles on my 08.
Team Owner
Joined: Sep 2000
Posts: 24,977
Likes: 2,690
From: Far NW 'burbs of Chicago
St. Jude Donor '13
Almost. Unless something has changed in the last few years (not unlikely), it uses the most recent history rather than everything in its past, nor even everything since last reset. That is, it does not reset when other items displayed by the fuel button on the DIC are reset. If you think about it, that makes sense. When you are on the highway, looking for the next station, you don't want it to assume that the grocery-getting miles you started the trip with are the 'real' average. You want it to work on what you are getting now.
....
....
Jim's quote indicates that the system only uses the last 10 miles or so of mpg, to calculate range. That fits with our experience.
Melting Slicks
Joined: Dec 2009
Posts: 3,213
Likes: 17
B.S.,,,did it on my 08-09,it, in the tank one of the floats.only way to fix it is pull the tank(per dealer) mine have never read over 230.GM has known this for a long time.just another great GM ....P.O.S.
WHATS SO BAD THEY HAVE KNOWN THIS FOR YRS.....like alot of other probs.............oh well......
WHATS SO BAD THEY HAVE KNOWN THIS FOR YRS.....like alot of other probs.............oh well......
Thread Starter
Racer
Joined: Jul 2010
Posts: 392
Likes: 3
From: Palm Coast Florida
I appreciate the feed back, I thought I was being too fussy, but after spending 70K and the car is only 2 days old I thought it should be made right. If it means removal of the gas tank however I might live with it. If GM is aware of the problem they should have a fix and the dealers should not blow off a customer. I love this Vette and if this the only thing that goes wrong I'll be a happy camper.
Capt Bob
Capt Bob