Re: Rough Starting 5KS

["Anthony K.B. Chan" <chan@seattleu.edu>]

I think it's the sensor called the thermotime switch that is going bad 
located at the back of the engine block i.e. the end facing the firewall. 
I had the same problem with the 85' 5000s that I used to own and I got it 
replace and the problem was fixed. I think it if I remember correctly from what my 
mechanic told me this switch control the cold-start valve. 

Anthony Chan, First Hill, Seattle, WA, USA.
chan@seattleu.edu
92' 100 V6

On Fri, 17 May 1996, Gary Harris wrote:

> Date: Fri, 17 May 1996 10:59:49 -0400 (EDT)
> From: Gary Harris <garyjh@bernstein.com>
> To: quattro@coimbra.ans.net
> Subject: Rough Starting 5KS
> 
> 
> My '88 5KS ( 71k miles) has recently been exhibiting a strange behavior when
> starting.  Right after I feel the engine fire up, it will have an
> *extremely* rough idle.  The car will shake and the engine will make
> coughing/sputtering sounds (as if its not getting enough fuel).  This all
> lasts for about 5 - 10 seconds.  Then, almost instantly, the engine will
> smooth out and idle normally.  I normally do not touch the accelerator
> during startup, but if I do during this rough idling (very lightly, in an
> attempt to get it running) the engine will stall.
> 
> Also, sometimes it will take two or three attempts to get the engine to
> start (this is before the rough stuff begins).
> 
> This seems to happen only during cold starts.
> 
> I've tried different gasolines without success.  The car had a full tune up
> less than 10k miles ago.  I'm using Castrol GTX 20/50 (changed less than 1k
> miles ago).  After the engine does start and idles smoothly, it runs great!!
> 
> So, what's going on here?!? I would greatly appretiate any
> advice/recomendations!!
> 
> TIA!
> 
> Gary - NYC
> 
> 
> 
> 
> 
>