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Today's topics:
* Speedometer error - 1 messages, 1 author
http://groups.google.com/group/rec.autos.makers.honda/t/dd0e0cb203486443?hl=en
* cautionary tale - 1 messages, 1 author
http://groups.google.com/group/rec.autos.makers.honda/t/472e080b968b9e31?hl=en
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TOPIC: Speedometer error
http://groups.google.com/group/rec.autos.makers.honda/t/dd0e0cb203486443?hl=en
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== 1 of 1 ==
Date: Mon, Nov 30 2009 9:10 am
From: "C. E. White"
"E. Meyer" <epmeyer50@gmail.com> wrote in message
news:C72772A2.141DC%epmeyer50@gmail.com...
>
>
>
> On 11/16/09 7:46 PM, in article NfnMm.35145$de6.3110@newsfe21.iad,
> "Piperson" <ppsn168@yahoo.com> wrote:
>
>> Surely you jest!!!
>>
>> Certainly GPS's are not "definitively" accurate with locational
>> information, but the time traveled between too "not-so-perfect"
>> locations should be dead on. Speed indications should be very
>> accurate
>> compared to most automotive speedometers.
>>
>> Also, I am sure car makers would not design in inaccuracy to
>> "account
>> for liability laws", leaving themselves open to lawsuits for short
>> changing owners of warranty limits. If the meter is reading too
>> high,
>> the odometer is approaching the warranty limit too fast.
>
> And Honda lost a class action suit for exactly that reason several
> years
> ago. The warranted mileage on my '06 CR-V was extended as part of
> that
> settlement.
An odometer that over reports the mileage makes the gas mileage look
good also.
However, speedodometer and odometer errors are not always directly
linked. I check all mine versus measured miles, the GPS, know
distances, and the interstate mile markes. The last five Fords I owned
all under reported the mileage traveled (by 1% to 3%) and over
reported the speed (by 1 to 3 mph).
I beleive the GPS is very accurate for both speed, and measuring
longer distances. I checked the GPS over the same course multiple
tiems, and there is no significant variation in the distance reported.
If, you leave the GPS in one position for a long period of time, it
will report slight movement, but this doesn't affect the accuracy for
a single trip over any significant distance.
Ed
>
>>
>> Lastly. A very easy method of determining speed is by the time is
>> takes
>> to go between mileage markers on most highways. At 60 MPH one mile
>> should take exactly 60 seconds.
>>
>> On 11/16/2009 8:06 PM, Tegger wrote:
>>> Nasty <nasty@tampabay.rr.com> wrote in news:4b01c85e$0$4857
>>> $9a6e19ea@unlimited.newshosting.com:
>>>
>>>> My 2000 Accord speedometer is off by about 8 mph according to my
>>>> gps.
>>>> It's kind of a good thing, it'll read 70 but I'm actually doing
>>>> about
>>>> 62. Is there a fix for this?
>>>>
>>>> TIA
>>>
>>>
>>>
>>>
>>> GPS's are not definitively accurate. There is a fairly large
>>> built-in error
>>> in all GPS's. GPS satellites are the property of the US Department
>>> of
>>> Defense, and the military doesn't want you having the same thing
>>> they've
>>> got for reasons of national security. This is outlined in all the
>>> new-car
>>> PDI docs issued by Honda for vehicles that have NAVI.
>>>
>>> In addition to that, speedometers are designed to be "fast" on
>>> account of
>>> liability laws. Add the two together, and it could well be 8mph at
>>> 62 or
>>> 70.
>>>
>>> If you really want to know your car's speedo/odo accuracy, you
>>> need to
>>> spend some time with a piece of chalk and a long tape measure.
>>>
>>>
>
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TOPIC: cautionary tale
http://groups.google.com/group/rec.autos.makers.honda/t/472e080b968b9e31?hl=en
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== 1 of 1 ==
Date: Sat, Dec 5 2009 10:11 pm
From: jim beam
http://www.flickr.com/photos/38636024@N00/4162355180/
when is the last time you checked /your/ valve lash? don't you want to
avoid this little problem?
just pulled this from a civic with "an emissions problem". the
incredible doofus that was ripping the owner off trying to "fix" the
problem, simply welded in a second HUGE catalyst into the exhaust
system. and was disappointed when it didn't work! then they removed
the bulb from the "check engine" light...
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