[s-cars] irregular temp gauge readings

[Mark Strangways]

Sounds like the MFTS on my old 5000 CDQ.
Up and down like a toilet seat.

Mark
----- Original Message ----- 
From: "Matthew Russell" <skippertgore at msn.com>
To: "audi list" <s-car-list at audifans.com>
Sent: Monday, January 30, 2006 6:29 PM
Subject: [s-cars] irregular temp gauge readings


> Have replaced thermostat twice now, boiled both thermostats and both 
> appear good. (opening around 87 C).
> 
> HVAC channel 51 reads correctly (86-89 at operating temperature) - 
> meaning the MFTS is functioning, correct?
> 
> Symptoms are that temp gauge will start to rise as car warms up from 
> cold, then will plummet down to almost nothing, then may come back up 
> in 5 minutes or so (time varies).
> 
> Is the sending unit for the temp gauge located between the back of the 
> engine and the firewall, in a plastic fitting with coolant hoses on 
> either end of the fitting, held in by a clip?  Is this the likely 
> culprit? Can someone point me in the right direction?
> 
> TIA,
> -Matt, CO
> 92 s4
> 
> 
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