[urq] odd temp behavior

[Mike Sylvester]

This experiment will have to wait until I can drive the car again.

Mike



> -------- Original Message --------
> Subject: Re: [urq] odd temp behavior
> From: "Mike Sylvester" <mike at urq20v.com>
> Date: Tue, February 28, 2012 11:19 am
> To: "Steve Buchholz" <urq at pacbell.net>, "urq Audifans"
> <urq at audifans.com>
> 
> 
> I'll have to verify if the high temp reading is linked with the blower
> motor speed or the heater temp selection.
> If it were the blower motor speed I would have also seen this behavior
> in the summer, but the possibility of a bad ground can't be overlooked
> in these cars.
> 
> The temp it doesn't jump around right away when the blower is turned on
> or off.
> When it is hot and I turn off the blower and change the heat setting ,
> it takes about 5 minutes for the engine temp reading to come back down.
> 
> Mike
> 
> 
> 
> > -------- Original Message --------
> > Subject: Re: [urq] odd temp behavior
> > From: "Steve Buchholz" <urq at pacbell.net>
> > Date: Tue, February 28, 2012 10:36 am
> > To: "Mike Sylvester" <mike at urq20v.com>,  "urq Audifans"
> > <urq at audifans.com>
> > 
> > 
> > By any chance were you running the interior blower at the same time? IME the ground current from the blower causes a voltage drop in the gauge's ground which causes erroneous readings.
> > 
> > Steve Buchholz (mobile)
> > 
> > ----- Reply message -----
> > From: "Mike Sylvester" <mike at urq20v.com>
> > Date: Tue, Feb 28, 2012 6:29 am
> > Subject: [urq] odd temp behavior
> > To: "urq Audifans" <urq at audifans.com>
> > 
> > With the mild weather we've had here in NE, I've driven the urq a few
> > times.
> > I've noticed that engine temperature has been abnormally high, which
> > seemed odd since the outside air temp was in the 30's.
> > 
> > The strangest part is that the engine temp only goes high if I have the
> > heat in the hot position.  If I move it to cold, the engine temp will
> > drop back to normal after a few minutes.
> > 
> > This seems completely counter-intuitive.  How can allowing coolant to
> > flow through the heater core cause the engine temp to rise?
> > Is is as if it ceases to flow through the radiator when the heater valve
> > is open.
> > 
> > 
> > Mike
> > 
> > 
> > 
> > 
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