[DeTomaso] Temp Gauge & Speedo Light

Richard Greenblum richard at richardgreenblum.com
Sun Apr 26 18:33:01 EDT 2015


I've been ignoring it for a while. There's got to be a way to fix it, even if the gauge has to be rebuilt. I wonder if the in-line resistor has gone bad it would do this.

Sent from my iPhone

> On Apr 26, 2015, at 16:13, Bobby Udell <bobbykart at gmail.com> wrote:
> 
> Hi Richard
>  
> This happened to me, finally I got a laser temp gauge and aimed it at the radiator, water pump, themostat housing etc. All were showing 180 degrees
> verdict, temp gauge is off kilter. So I ignore it now. I have changed the coolant
> 
>> On Sun, Apr 26, 2015 at 10:59 AM, Richard Greenblum <richard at richardgreenblum.com> wrote:
>> All,
>> 
>> Getting ready for the Rally, looking for insight.
>> 
>> 1. Water temp gauge used to work well. Then after the engine got to operating temp, would jump into the red very quickly. It would then work as if the scale had been changed. It would read around 255 on the highway, and after transitioning to surface streets and lots of traffic would read hotter, about the same movement as when it worked properly. It used to run just under 190 on the highway and approx 200 or 205 in traffic. The car is not overheating. I've shut it down with it reading 270 and no gurgle much less spewing steam or water. Waited a couple of minutes for it to heat soak and turned the key. It fired right up and idled and ran perfectly. I replaced the sender (sourced from a Pantera vendor) with no change. I grounded the terminal and the gauge pegs (hot end). I thought that meant the electrical system is working. I guess the replacement sender could be defective, got a new one to try. Haven't found any ground or lead connection problems.
>> 
>> 2. My speedo light is out. Looks awfully hard to change the bulb with it on top. Any ideas on best approach? Perhaps just removing the speedo cable?
>> 
>> Thanks
>> 
>> Richard
>> Austin, TX
>> #7080
>> 
>> Sent from my iPhone
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-------------- next part --------------
   I've been ignoring it for a while. There's got to be a way to fix it,
   even if the gauge has to be rebuilt. I wonder if the in-line resistor
   has gone bad it would do this.

   Sent from my iPhone

   On Apr 26, 2015, at 16:13, Bobby Udell <[1]bobbykart at gmail.com> wrote:

   Hi Richard

   This happened to me, finally I got a laser temp gauge and aimed it at
   the radiator, water pump, themostat housing etc. All were showing 180
   degrees
   verdict, temp gauge is off kilter. So I ignore it now. I have changed
   the coolant
   On Sun, Apr 26, 2015 at 10:59 AM, Richard Greenblum
   <[2]richard at richardgreenblum.com> wrote:

     All,
     Getting ready for the Rally, looking for insight.
     1. Water temp gauge used to work well. Then after the engine got to
     operating temp, would jump into the red very quickly. It would then
     work as if the scale had been changed. It would read around 255 on
     the highway, and after transitioning to surface streets and lots of
     traffic would read hotter, about the same movement as when it worked
     properly. It used to run just under 190 on the highway and approx
     200 or 205 in traffic. The car is not overheating. I've shut it down
     with it reading 270 and no gurgle much less spewing steam or water.
     Waited a couple of minutes for it to heat soak and turned the key.
     It fired right up and idled and ran perfectly. I replaced the sender
     (sourced from a Pantera vendor) with no change. I grounded the
     terminal and the gauge pegs (hot end). I thought that meant the
     electrical system is working. I guess the replacement sender could
     be defective, got a new one to try. Haven't found any ground or lead
     connection problems.
     2. My speedo light is out. Looks awfully hard to change the bulb
     with it on top. Any ideas on best approach? Perhaps just removing
     the speedo cable?
     Thanks
     Richard
     Austin, TX
     #7080
     Sent from my iPhone
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References

   1. mailto:bobbykart at gmail.com
   2. mailto:richard at richardgreenblum.com
   3. mailto:DeTomaso at poca.com
   4. http://poca.com/mailman/listinfo/detomaso_poca.com


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