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  #1 (permalink)  
Old 28 Nov 2009, 06:09 pm
aemeijers
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Default 99 Honda Accord temp gauge question

99 Accord 4cyl, auto, 105k miles. Had the rubber band changed a couple
months ago, shortly before the weather got cold. Also did water pump at
the same time (since they had it apart anyway), and changed plugs,
wires, etc.

Since then, at cold start, the temp needle takes forever getting off the
peg. At highway speed, it drops down to just above the peg, and only
shows in what I consider the 'normal' range (1/3 to 1/2 of scale) when
driving in town in stop and go traffic. Engine seems to run fine, and
MPG is still mid-20s in town, and a hair under 30 on highway.

Do I have a problem? If I take it back to same shop, what do I need to
ask them to check? Bad sensor? Bad gauge? Wrong T-stat?

Any ideas appreciated- I haven't done any wrenching to speak of since
carburetor non-computer days. Hate to just throw parts at it, since
Honda parts cost twice what normal cars do, it seems. The shell is still
clean, so I was hoping to get another 5-6 years out of this thing.

--
aem sends...
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  #2 (permalink)  
Old 28 Nov 2009, 06:41 pm
JRE
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Default Re: 99 Honda Accord temp gauge question

aemeijers wrote:
> 99 Accord 4cyl, auto, 105k miles. Had the rubber band changed a couple
> months ago, shortly before the weather got cold. Also did water pump at
> the same time (since they had it apart anyway), and changed plugs,
> wires, etc.
>
> Since then, at cold start, the temp needle takes forever getting off the
> peg. At highway speed, it drops down to just above the peg, and only
> shows in what I consider the 'normal' range (1/3 to 1/2 of scale) when
> driving in town in stop and go traffic. Engine seems to run fine, and
> MPG is still mid-20s in town, and a hair under 30 on highway.
>
> Do I have a problem? If I take it back to same shop, what do I need to
> ask them to check? Bad sensor? Bad gauge? Wrong T-stat?
>
> Any ideas appreciated- I haven't done any wrenching to speak of since
> carburetor non-computer days. Hate to just throw parts at it, since
> Honda parts cost twice what normal cars do, it seems. The shell is still
> clean, so I was hoping to get another 5-6 years out of this thing.
>
> --
> aem sends...


Thermostat.

--
JRE
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  #3 (permalink)  
Old 28 Nov 2009, 06:54 pm
AZ Nomad
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Default Re: 99 Honda Accord temp gauge question

On Sat, 28 Nov 2009 18:09:12 -0500, aemeijers <aemeijers@att.net> wrote:
>99 Accord 4cyl, auto, 105k miles. Had the rubber band changed a couple
>months ago, shortly before the weather got cold. Also did water pump at
>the same time (since they had it apart anyway), and changed plugs,
>wires, etc.


If the engine runs then it will generate enough heat to overheat in
short order. If it is overcooling than you have a bad thermostat.
Or you've somehow recalled the laws of physics.
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  #4 (permalink)  
Old 28 Nov 2009, 07:36 pm
Steve W.
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Default Re: 99 Honda Accord temp gauge question

aemeijers wrote:
> 99 Accord 4cyl, auto, 105k miles. Had the rubber band changed a couple
> months ago, shortly before the weather got cold. Also did water pump at
> the same time (since they had it apart anyway), and changed plugs,
> wires, etc.
>
> Since then, at cold start, the temp needle takes forever getting off the
> peg. At highway speed, it drops down to just above the peg, and only
> shows in what I consider the 'normal' range (1/3 to 1/2 of scale) when
> driving in town in stop and go traffic. Engine seems to run fine, and
> MPG is still mid-20s in town, and a hair under 30 on highway.
>
> Do I have a problem? If I take it back to same shop, what do I need to
> ask them to check? Bad sensor? Bad gauge? Wrong T-stat?
>
> Any ideas appreciated- I haven't done any wrenching to speak of since
> carburetor non-computer days. Hate to just throw parts at it, since
> Honda parts cost twice what normal cars do, it seems. The shell is still
> clean, so I was hoping to get another 5-6 years out of this thing.
>
> --
> aem sends...


Sounds like an open or missing thermostat. Not an uncommon thing to have
them bad out of the box. One of the reasons I test all the ones I buy
before they get installed.

If they are a good shop they will throw a scan tool on it before they
pull it apart. The tool will show if the gauge is correct or if it
really is running cold.


--
Steve W.
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  #5 (permalink)  
Old 28 Nov 2009, 08:39 pm
jim
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Posts: n/a
Default Re: 99 Honda Accord temp gauge question



aemeijers wrote:
>
> 99 Accord 4cyl, auto, 105k miles. Had the rubber band changed a couple
> months ago, shortly before the weather got cold. Also did water pump at
> the same time (since they had it apart anyway), and changed plugs,
> wires, etc.
>
> Since then, at cold start, the temp needle takes forever getting off the
> peg. At highway speed, it drops down to just above the peg, and only
> shows in what I consider the 'normal' range (1/3 to 1/2 of scale) when
> driving in town in stop and go traffic. Engine seems to run fine, and
> MPG is still mid-20s in town, and a hair under 30 on highway.
>
> Do I have a problem? If I take it back to same shop, what do I need to
> ask them to check? Bad sensor? Bad gauge? Wrong T-stat?


Why is it you think the car might suddenly acquire the wrong thermostat?
If changing the thermostat was part of the recent maintenance work, go
back and complain.

What you describe is exactly what happens with an stuck open
thermostat or perhaps even no thermostat. Probably it is stuck open
(unless for some reason they removed it). Extremely unlikely that the
gauge or sending unit is bad. Its pretty close to impossible, given your
precise description of what its doing, that it could have a properly
working thermostat and a bad gauge or sending unit.

-jim

>
> Any ideas appreciated- I haven't done any wrenching to speak of since
> carburetor non-computer days. Hate to just throw parts at it, since
> Honda parts cost twice what normal cars do, it seems. The shell is still
> clean, so I was hoping to get another 5-6 years out of this thing.
>
> --
> aem sends...

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  #6 (permalink)  
Old 29 Nov 2009, 12:54 am
aemeijers
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Posts: n/a
Default Re: 99 Honda Accord temp gauge question

jim wrote:
>
> aemeijers wrote:
>> 99 Accord 4cyl, auto, 105k miles. Had the rubber band changed a couple
>> months ago, shortly before the weather got cold. Also did water pump at
>> the same time (since they had it apart anyway), and changed plugs,
>> wires, etc.
>>
>> Since then, at cold start, the temp needle takes forever getting off the
>> peg. At highway speed, it drops down to just above the peg, and only
>> shows in what I consider the 'normal' range (1/3 to 1/2 of scale) when
>> driving in town in stop and go traffic. Engine seems to run fine, and
>> MPG is still mid-20s in town, and a hair under 30 on highway.
>>
>> Do I have a problem? If I take it back to same shop, what do I need to
>> ask them to check? Bad sensor? Bad gauge? Wrong T-stat?

>
> Why is it you think the car might suddenly acquire the wrong thermostat?
> If changing the thermostat was part of the recent maintenance work, go
> back and complain.
>
> What you describe is exactly what happens with an stuck open
> thermostat or perhaps even no thermostat. Probably it is stuck open
> (unless for some reason they removed it). Extremely unlikely that the
> gauge or sending unit is bad. Its pretty close to impossible, given your
> precise description of what its doing, that it could have a properly
> working thermostat and a bad gauge or sending unit.
>
> -jim
>
>> Any ideas appreciated- I haven't done any wrenching to speak of since
>> carburetor non-computer days. Hate to just throw parts at it, since
>> Honda parts cost twice what normal cars do, it seems. The shell is still
>> clean, so I was hoping to get another 5-6 years out of this thing.
>>
>> --
>> aem sends...


Appreciate all the replies, everyone. I was hoping it was something
minor like that. Unless we get a warm spell, guess I need to take it
back to the shop. :^(

--
aem sends...

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  #7 (permalink)  
Old 29 Nov 2009, 05:09 am
Dave D
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Posts: n/a
Default Re: 99 Honda Accord temp gauge question


"aemeijers" <aemeijers@att.net> wrote in message
news:XKKdnf1Yg9M7kY_WnZ2dnUVZ_sadnZ2d@giganews.com ...
> jim wrote:
>>
>> aemeijers wrote:
>>> 99 Accord 4cyl, auto, 105k miles. Had the rubber band changed a couple
>>> months ago, shortly before the weather got cold. Also did water pump at
>>> the same time (since they had it apart anyway), and changed plugs,
>>> wires, etc.
>>>
>>> Since then, at cold start, the temp needle takes forever getting off the
>>> peg. At highway speed, it drops down to just above the peg, and only
>>> shows in what I consider the 'normal' range (1/3 to 1/2 of scale) when
>>> driving in town in stop and go traffic. Engine seems to run fine, and
>>> MPG is still mid-20s in town, and a hair under 30 on highway.
>>>
>>> Do I have a problem? If I take it back to same shop, what do I need to
>>> ask them to check? Bad sensor? Bad gauge? Wrong T-stat?

>>
>> Why is it you think the car might suddenly acquire the wrong thermostat?
>> If changing the thermostat was part of the recent maintenance work, go
>> back and complain.
>>
>> What you describe is exactly what happens with an stuck open
>> thermostat or perhaps even no thermostat. Probably it is stuck open
>> (unless for some reason they removed it). Extremely unlikely that the
>> gauge or sending unit is bad. Its pretty close to impossible, given your
>> precise description of what its doing, that it could have a properly
>> working thermostat and a bad gauge or sending unit. -jim
>>> Any ideas appreciated- I haven't done any wrenching to speak of since
>>> carburetor non-computer days. Hate to just throw parts at it, since
>>> Honda parts cost twice what normal cars do, it seems. The shell is still
>>> clean, so I was hoping to get another 5-6 years out of this thing.
>>>
>>> --
>>> aem sends...

>
> Appreciate all the replies, everyone. I was hoping it was something minor
> like that. Unless we get a warm spell, guess I need to take it back to the
> shop. :^(
>
> --
> aem sends...

One further question - does the heater output coincide with the temp gauge?
That is - does the heater take forever to get warm and only put out warm air
or does the heater seem to work as it should? If the heater is working
normally, the best guess would be either the sending unit or the temp gauge.
If the heater isn't working as it should, then the best bet is the
thermostat.

DaveD
>



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  #8 (permalink)  
Old 29 Nov 2009, 12:13 pm
Jim Yanik
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Posts: n/a
Default Re: 99 Honda Accord temp gauge question

aemeijers <aemeijers@att.net> wrote in news:G--
dneWEt7IIMIzWnZ2dnUVZ_hKdnZ2d@giganews.com:

> 99 Accord 4cyl, auto, 105k miles. Had the rubber band changed a couple
> months ago, shortly before the weather got cold. Also did water pump at
> the same time (since they had it apart anyway), and changed plugs,
> wires, etc.
>
> Since then, at cold start, the temp needle takes forever getting off the
> peg. At highway speed, it drops down to just above the peg, and only
> shows in what I consider the 'normal' range (1/3 to 1/2 of scale) when
> driving in town in stop and go traffic. Engine seems to run fine, and
> MPG is still mid-20s in town, and a hair under 30 on highway.
>
> Do I have a problem? If I take it back to same shop, what do I need to
> ask them to check? Bad sensor? Bad gauge? Wrong T-stat?
>
> Any ideas appreciated- I haven't done any wrenching to speak of since
> carburetor non-computer days. Hate to just throw parts at it, since
> Honda parts cost twice what normal cars do, it seems. The shell is still
> clean, so I was hoping to get another 5-6 years out of this thing.
>
> --
> aem sends...
>


I'd suspect the T-stat.it's probably stuck open.
I doubt they changed it during the timing belt service.

--
Jim Yanik
jyanik
at
localnet
dot com
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  #9 (permalink)  
Old 29 Nov 2009, 01:11 pm
Grumpy AuContraire
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Posts: n/a
Default Re: 99 Honda Accord temp gauge question

Jim Yanik wrote:
> aemeijers <aemeijers@att.net> wrote in news:G--
> dneWEt7IIMIzWnZ2dnUVZ_hKdnZ2d@giganews.com:
>
>> 99 Accord 4cyl, auto, 105k miles. Had the rubber band changed a couple
>> months ago, shortly before the weather got cold. Also did water pump at
>> the same time (since they had it apart anyway), and changed plugs,
>> wires, etc.
>>
>> Since then, at cold start, the temp needle takes forever getting off the
>> peg. At highway speed, it drops down to just above the peg, and only
>> shows in what I consider the 'normal' range (1/3 to 1/2 of scale) when
>> driving in town in stop and go traffic. Engine seems to run fine, and
>> MPG is still mid-20s in town, and a hair under 30 on highway.
>>
>> Do I have a problem? If I take it back to same shop, what do I need to
>> ask them to check? Bad sensor? Bad gauge? Wrong T-stat?
>>
>> Any ideas appreciated- I haven't done any wrenching to speak of since
>> carburetor non-computer days. Hate to just throw parts at it, since
>> Honda parts cost twice what normal cars do, it seems. The shell is still
>> clean, so I was hoping to get another 5-6 years out of this thing.
>>
>> --
>> aem sends...
>>

>
> I'd suspect the T-stat.it's probably stuck open.
> I doubt they changed it during the timing belt service.
>



....or they removed and never replaced it..

JT

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  #10 (permalink)  
Old 30 Nov 2009, 06:46 pm
aemeijers
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Posts: n/a
Default Re: 99 Honda Accord temp gauge question

Dave D wrote:
> "aemeijers" <aemeijers@att.net> wrote in message
> news:XKKdnf1Yg9M7kY_WnZ2dnUVZ_sadnZ2d@giganews.com ...
>> jim wrote:
>>> aemeijers wrote:

(snip)
>> --
>> aem sends...

> One further question - does the heater output coincide with the temp gauge?
> That is - does the heater take forever to get warm and only put out warm air
> or does the heater seem to work as it should? If the heater is working
> normally, the best guess would be either the sending unit or the temp gauge.
> If the heater isn't working as it should, then the best bet is the
> thermostat.
>
> DaveD
>
>

Tested that today, by driving the car to work. Heater seems to work
fine, and blows warm within a couple blocks, and very warm within a mile
or so. (Car lives inside the attached but unheated garage, so the start
temp is warmer than a car that lives outside. Has to be subzero for the
garage to freeze hard.) All this with temp gauge on or slightly above
the peg. Gauge does still move a little, if car is stopped and idling.

Still too sniffly to get out there with a flashlight to see if I can get
to the temp sensor, with all the other crap in the way. No hurry at this
point, I guess- I can wait for a warm day, especially if the snow they
are forecasting for later this week actually happens. This is my road
trip car, and I don't have one of those for awhile.

--
aem sends...
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