[urq] Coolant temp sensor

[Buchholz, Steven]

The urq did not come with a factory coolant temp gauge, it has a blue
"cold" light on the dash and an overheat light.  If the PO used the
sensor near the radiator flange to fashion some sort of temp gauge it
would be quite likely to throw off the ECU.  I suppose if you had some
sort of digital temp gauge it might put a low enough load on the signal,
but a standard temp gauge drives a good bit of coolant.  

The factory coolant temp sensor is on the back of the head.  It is a 2
wire unit, one switch contact for overheat and the variable resistance
side used to light the cold light.  

Steve B
San Jose, CA (USA)
> 
> The P.O. has bridged the wire for a temp guage into the coolant temp
sensor
> wire on my '83 with  WX.  Is this throwing off my ECU - temp sensor
located
> near cooling neck & #1 cyl in the head and is the only one I see on
this
> engine.  Where is the cooling guage sensor on this engine - is there
one
> installed by factory?
> 
> I'm wondering if this has anything to do with the weirdness I have not
> seemed to isolate yet - coughing/backfiring on startup and hesistation
under
> full load.  Just replaced CPR and car runs better, but still the early
> morning cough.