[s-cars] Multifunction sensor Q's

[Tom Green]

Perhaps a look at <www.sjmautotechnik.com> can best answer your  
questions, Paul.  But, yes, your codes, and I assume an accompanying  
MIL (check
engine light) result in rich engine operation.  however, the  
underlying cause can be difficult to find.  It can be ignition, low  
fuel pressure, MAF error, or
exhaust leak causing measurement errors, O2 sensor, or a combination  
of failures.

The question about the MFTS is puzzling, since  all the sensor does  
is run the guage (well, and give an overtemp warning light on the  
instrument panel).

The thermostat malfunction is covered by SJM as well, it is slow to  
display temp on the guage when first starting and can't maintain  
operating temps
when it can't close properly, usually always causing cooler than  
normal temps that may result in fuel enrichment.

Tom

----Original message----
> Date: Sat, 24 Mar 2007 18:41:38 -0700 (PDT)
> From: Paul DAnneo <padanneo at sbcglobal.net>
> Subject: [s-cars] Multifuntion sensor Q's.
> To: S-CAR-List <S-CAR-List at audifans.com>
> Message-ID: <288468.31026.qm at web82815.mail.mud.yahoo.com>
> Content-Type: text/plain; charset=iso-8859-1
>
> Hello All,
>
>   Can someone confirm my thinking? On the car issues....
>
>   Codes pulled after hot temp stumbles. 2342 and 2413.
>
>   Both have to do with running rich?
>
>   If my Multifuntion sensor is bad, can my temp guage still function?
>
>   If my thermostat is stuck open, the engine will run cool and rich?
>
>   I thought that my boost issues were gone after replacing all the  
> turbo pressure valves and numerous small hoses that looked suspect.  
> Now at most boost issues are gone, till 30 min+ of consective  
> driving an then a consistant load, mostly hill climbs, as I live in  
> Tahoe, it's coming home.
>
>   Threw everyones assistance the cars issues are almost gone.
>
>   Again and Again thanks,
>
>   Paul