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Old 31 Dec 2005, 04:57 am
talbotlago
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Default Cause of range underreporting by 50% on '04 Accord Nav sys trip computer?

Can anyone suggest a likely cause for the sudden under-reporting by 50%
of available range remaining on a full tank of gas with my '04 Accord
EX V6 w/ nav system's trip computer? I have reset the "history"
function both on filling the tank as well as repeatedly every 10 miles
thereafter while on the highway cruising at 32+ displayed average, not
instant, mpg, yet rather than showing a range of ~540 miles (17 gal x
32 avg. mpg) as it used to until 2 weeks ago, the trip computer display
has under the same circumstances taken to showing a range left on a
full tank of only 226 miles, effectively ignoring half of the fuel in
the tank at the reported avg. 32 mpg that is being achieved
consistently on the highway.

The range very slowly climbs to 250 miles as the tank reaches displayed
1/2 full, so the problem effectively goes away at a half-tankful but
then returns to under-reporting as further fuel is consumed, on the
order of a 50 mile deficit, compared to calculations of the amount of
fuel remaining based on the displayed avg. mpg for the trip, times the
same avg. mpg value.

Could this be a fuel float / sender problem in the tank, or is it more
likely the nav. system chip(s)? As the car is now out of warranty, I
don't want to spend more than $50 getting this fixed if at all
possible. Suggestions, anyone?

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Old 31 Dec 2005, 01:11 pm
Stewart DIBBS
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Default Re: Cause of range underreporting by 50% on '04 Accord Nav sys trip computer?

"talbotlago" <talbotlago@comcast.net> wrote in message
news:1136026665.876552.188710@g44g2000cwa.googlegr oups.com...
> ... As the car is now out of warranty


If the (Honda?) Nav computer is functioning, it unlikely to be a chip
problem. More likely a connector problem somewhere.

If this is a 04 model, how is this out warranty? Does the nav system only
have a 12 month warranty?

Stewart DIBBS


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  #3 (permalink)  
Old 02 Jan 2006, 01:21 pm
muzz
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Default Re: Cause of range underreporting by 50% on '04 Accord Nav sys trip computer?

Probably the same type of reporting as my gas mileage on my
04 Civic hybrid - reported 48 I get 33





On Sat, 31 Dec 2005 14:11:12 -0500, "Stewart DIBBS" <sjd@pixcl.com>
wrote:

>"talbotlago" <talbotlago@comcast.net> wrote in message
>news:1136026665.876552.188710@g44g2000cwa.googleg roups.com...
>> ... As the car is now out of warranty

>
>If the (Honda?) Nav computer is functioning, it unlikely to be a chip
>problem. More likely a connector problem somewhere.
>
>If this is a 04 model, how is this out warranty? Does the nav system only
>have a 12 month warranty?
>
>Stewart DIBBS
>


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Old 07 Jul 2009, 09:27 pm
mike120877
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Default Re: Cause of range underreporting by 50% on '04 Accord Nav sys trip computer?


This just happened to me this week! Did you get your computer fixed?


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Old 08 Jul 2009, 09:19 pm
Isaiah
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Default Re: Cause of range underreporting by 50% on '04 Accord Nav sys trip computer?


"mike120877" <mike120877.3v0x5v@no-mx.hondapoint.com> wrote in message
news:mike120877.3v0x5v@no-mx.hondapoint.com...
>
> This just happened to me this week! Did you get your computer
> fixed?


Mine is regularly about 0.2-0.3 MPG less then the manual calculation.

>
>
> --
> mike120877
> ------------------------------------------------------------------------
> mike120877's Profile:
> http:///www.hondapoint.com/forum/mem...p?userid=16383
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