[DeTomaso] Water temp gauge update

[Mike Drew]

Steven,

Your Teflon goo is just like Teflon tape. Acting like an insulator. It’s a pipe thread and needs no goo. Thoroughly clean out the threads on both tank and sender and try again?

Mike

Sent from my iPad

> On Mar 19, 2020, at 06:00, Steven Edwards1969Dart <gsedwards at cox.net> wrote:
> 
>    Thanks for all the replies.
> 
> 
>   I will try to answer some of the questions
> 
> 
>   The engine is an aftermarket; all aluminum Fontana Block, C302 heads.
>   There is not thermostat boss, the heads are tapped 3/4" npt, both heads
>   are connected to a remote thermostat housing, which has provisions for
>   a mechanical temp probe and the EFI temp sending unit.
> 
>   The car came with the stock Veglia gauge sending unit in the tank, it
>   worked for over 30 years that I know of.
> 
>   The new sending unit did not have continuity from the base to the stud,
>   which it is suppose to until it warms to operating temp.
> 
>   As for Teflon tape. I do not use the tape, I used a small dab of paste,
>   then take my figure to spread it onto the threads, a little goes a long
>   way.
> 
> 
>   As for the sending unit as a idiot light, which is possible, put in
>   wrong box. My thought are the light and the gauge sending unit should
>   work the same function. The light is off or on, should be open when
>   cold then close when hot, where the gauge is open when cold, giving a
>   variable ground as it gets hot. They are not interchangeable, but
>   should be open then cold. I maybe wrong on this function, but it should
>   be a grounding circuit.
> 
> 
>   I just did a separate wire test, ran a wire from the gauge to the
>   sending unit, turned on the key and the gauge went to max. So my
>   thoughts are the sending unit is the cause. I have a new sending unit
>   coming, will try that. I am confused as to why it is grounded thru the
>   wire, but the meter continuity test shows it open between the base and
>   stud. Very strange.
> 
> 
>   Steven Edwards
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