will a poss thermostat prob cause crap mpg?

[dares_uk]

ok, i think i have themorstat issues on my 1999 s3,
the temp gauge occasionly works, if it does it never goes up past a quarter,
and will go back to nothin sometimes too,

would this effect mpg at all?

im getting 300 to a tank atm, a tank = £60. :s
exspensive,
but recently lost my job too, so dont wonna go throwing money
at a thermostat change if it aint gonna help really.

and can ant one recomend any garages around exeter, newton abbot, torquay
for some work on my car, and which are reasonable/cheap??

cheers

 

[Speedy Steve]

Yes it can but id be tempted to get the temp sensor aswell. I did just for peace of mind

 

[golf]

300 a tank is decent if you're doing mostly motorway. The thermostat can be a DIY job but only if you have the correct tools, as the bottom bolt on the thermostat housing is an absolute nightmare to get out.

 

[finesse]

Temp Sensor change
http://www.wak-tt.com/tempsensor/tempsensor.htm

Thermo change
http://www.tt-forum.co.uk/forum/viewtopic.php?t=56316

 

[<tuffty/>]

If the engine isn't getting warm because the thermo is sticking and/or the temp sender is playing up so the ECU thinks the engine isn't warm then yes you will use more fuel.

300 miles for a tank isn't bad all things considered though...

<tuffty/>

 

[dyce martin]

i am only getting 250 miles per £60 tank this is doing short journeys maybe 5 miles at most
i thought this was ok and would be happy with 300 per tank!!

 

[Speedy Steve]

At one stage my stage 1 mapped S3 was doing 400-425 miles to a tank

 

[martin g]

At one stage my stage 1 mapped S3 was doing 400-425 miles to a tank

My car tells me I get this too, but how accurate the car is ...well thats different

 

[brys3]

I live on the isle of man so a full tank of v power costs me 80. My average mpg is 27 And my s3 is supposed to be remapped. I have this similar problem with my temp gauge too. Onboard comp last night said I'll get 410 miles, I'll see how this goes and report back. Relieved someone is in my situation