[s-cars] I want my MPG

[yo-cello at comcast.net]

I'll second the sensor on the back of the head.  It's been the cause of poor MPG on 4 of the 5 audis I've owned.  And when that occurred, I also had more smoke coming from the tailpipe in the mornings.

The other indicator could be a bad thermostat, with it being stuck open (had that happen too).  Symptoms are poor mpg, temp guage never getting to normal (at least here in VT), and really poor heat.  But the mpg variance wasn't as great as when the water temp sensor went bad.

Good luck,
Paul

-------------- Original message -------------- 
From: Floyd Noel <floyd.noel at gmail.com> 

> Thanks, I'll check that out. My non-audi friend thought it could be 
> the fuel filter as well. Any thoughts? 
> 
> R/S 
> Floyd Noel 
> Sgt/USMC 
> 
> On Dec 26, 2007, at 21:05, Michael Wakefield 
> wrote: 
> 
> > Check the water temperature sensor on the back of the head. if the 
> > ECU thinks the engine is cold, it will run very rich. 
> > Mike Wakefield 
> > 
> > On Dec 26, 2007, at 9:39 PM, Floyd Noel wrote: 
> > 
> >> Listers, 
> >> My s-car has been getting horrible mileage lately (around 11.5) and I 
> >> have been trying to diagnose the problem. Power seems like it has 
> >> gone 
> >> down as well, but my butt dyno isn't the most accurate, and it still 
> >> has way more than my work Malibu. It also seems like to me that there 
> >> is more smoke coming from the tailpipe than I would prefer on cold 
> >> mornings, but in the daytime it is not really a problem. I just 
> >> replaced the spark plugs recently, not much difference. From the 
> >> research I've done, it seems like it might be the oxygen sensor, and 
> >> I'm not sure when the last time it was changed, so I figured it 
> >> wouldn't hurt to change it. Are there any other things I should 
> >> consider or steps I should take? I bought fuel injector cleaner as 
> >> well but haven't used it yet. 
> >> TIA 
> >> 
> >> R/S 
> >> Floyd Noel 
> >> Sgt/USMC 
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> > 
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