[s-cars] RE:Was - Original Chips - Now - MPG

[Sean Douglas]

The coolant temperature should be 90 degrees celcius under operating
conditions. If the gauge is reading low either the thermostat is stuck
open or you have a bad multifunction temp sensor (MFTS). If the oil temp
is not getting to the normal range quickly, then it's a good indication
of a stuck open t-stat, otherwise its probably a bad MFTS.

The MFTS is easy to replace, it's a 10 min job with a deep socket (29
mm??), the t-stat is a little longer, but quite easy to replace. I
replace the t-stat every 80-100,000 km.

Sean Douglas
1997 Audi S6//RS2-spec
1990 Audi 90 quattro 20v


> -----Original Message-----
> From: s-car-list-bounces+quattro20v=telus.net at audifans.com 
> [mailto:s-car-list-bounces+quattro20v=telus.net at audifans.com] 
> On Behalf Of Adam Cramer
> Sent: Thursday, April 07, 2005 4:30 PM
> To: Ned Ritchie
> Cc: s-car-list at audifans.com
> Subject: Re: [s-cars] RE:Was - Original Chips - Now - MPG
> 
> 
> How can you tell if you have a bad thermostat or temp sensor?
> 
> 
> On Apr 7, 2005 2:08 PM, Ned Ritchie 
> <Q at intendedacceleration.com> wrote:
> > Oxygen Sensors 101
> > 
> > "What Happens to Fuel With an Engine Miss?"
> > 
> > A little engine MISS will drive the oxygen content of the exhaust 
> > upward.
> > 
> > This is correctly detected by the O2 sensor, but an inappropriate 
> > conclusion of a TOO LEAN condition is reached.  The 
> Computer lengthens 
> > the duration of the pulse of ALL the injectors to correct 
> the SUPPOSED 
> > LEAN condition causing a RICH STUMBLE which may make 
> another cylinder 
> > MISS with it's oxygen not burned going out the exhaust.  
> WHOA!  More 
> > oxygen!  The situation just gets worse.  More fuel is added.  VERY 
> > POOR MILEAGE!!!
> > 
> > Now throw in a defective temp sensor, thermostat, or a sluggish O2 
> > sensor. . .
> > 
> > Ned Ritchie
> > www.IntendedAcceleration.com
> > 
> > -----Original Message-----
> > From: s-car-list-bounces at audifans.com 
> > [mailto:s-car-list-bounces at audifans.com] On Behalf Of Bill Clancy
> > Sent: Wednesday, April 06, 2005 10:00 AM
> > To: Abhijit Kondajji; s-car-list at audifans.com
> > Subject: Re: [s-cars] Re: Was - Original Chips, Now - MPG
> > 
> > Hmmm
> > I have known for a while that my thermostat is not working 
> correctly.   But
> > since I rarely need the heater I forget about it.    That 
> must be part of my
> > problem.
> > 
> > thanks for the reminder.
> > -Bill
> > 
> > ----- Original Message -----
> > From: "Abhijit Kondajji" <abhijitkondajji at gmail.com>
> > To: <s-car-list at audifans.com>
> > Sent: Wednesday, April 06, 2005 7:44 AM
> > Subject: [s-cars] Re: Was - Original Chips, Now - MPG
> > 
> > I get about 24 MPG on the highway with intermixed 75 MPH/90 MPH 
> > driving. In the city, my daily work commute is 5 miles one way, in 
> > heavy stop and go traffic and I still get about 20 MPG. The 
> car is on 
> > Mihnea Crack II chipset and is otherwise up to date on maintenance.
> > 
> > When I had a stuck open thermostat, the most I got was 13 MPG and a 
> > severe cold/sniffle from living in an Igloo (maybe it just 
> resembled 
> > one inside).
> > 
> > Adding my 2 Rupees, which is $0.00002......
> > 
> > Regards,
> > Abhijit
> > 
> > Date: Tue, 5 Apr 2005 21:58:19 -0400
> > From: "Tom Mullane" <tmullane at snet.net>
> > Subject: Re: RE: [s-cars] RE: Original Chips
> > To: <s-car-list at audifans.com>
> > Message-ID: <200504060159.j361xYYj028343 at ylpvm53.prodigy.net>
> > Content-Type: text/plain;       charset="us-ascii"
> > 
> > Since this fuel thread is turning into a survey, I may as 
> well weigh 
> > in.
> > 
> > My car gets somewhere around 10 mpg.
> > 
> > Due to this crazy FMIC project and the winter weather, the 
> S lives in 
> > the garage most of the time.  When it does come out, it is usually 
> > only for a few hours of driving that would make Paul K look like my 
> > grandfather.  It also gets plenty of idling time.  Current 
> status is 
> > immobile, but I have hopes.
> > 
> > I follow the same course with the Miata, but I can't seem 
> to get less 
> > than 20 mpg out of that.  Maybe a chip....?
> > 
> > Tom
> > 
> > _______________________________________________
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> >
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