[urq] Coolant temp sensor

[Ben Swann]

Steve,

When I saw this, I was surprised this wasn't causing a more serious problem.
The wire is the return through ground from the guage which is fed by a
positive - pretty standard, except the sensor wire was tapped with one of
those crimp on connectors they supply with cheap light kits.

Anyway, I fixed it.

Ben
[Date: Tue, 5 Apr 2005 14:54:14 -0700
From: "Buchholz, Steven" <Steven.Buchholz at kla-tencor.com>
Subject: RE: [urq] Coolant temp sensor
To: <urq at audifans.com>
Message-ID:
<BD316B4584174147B080289F69FC7616019F7F67 at CA1EXCLV03.adcorp.kla-tencor.com>

Content-Type: text/plain; charset="us-ascii"

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.

Ben]