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Ok time to get to the bottom of this!(Added VAG log)

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  #1  
Old 02-23-2007, 08:38 PM
alias747's Avatar
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Default Ok time to get to the bottom of this!(Added VAG log)

(The crappy MPG I am getting is pissing me off. When I first bought my car back in october, the first few tanks I was getting like 27-28. Which sounds right to me since I drive like 90% highway at like 60-65 m/hr. But since then I haven't gotten any better than 21. In fact the last 2 tanks I have gotten under 20. I am maybe think it is an O2 sensor on the fritz, because my exhaust smells strong sometimes. I have vag-com version 311-2. How do you find out if they are dying? I have searched for this trust me.

Also I have already changed my sparks and air filter and my throttle body was as clean as a whistle last time I checked it. Some may say it is becuase of the cold, I could understand when it was like -10 or colder like 3 weeks ago, but it has been fairly mild this last week and a half. Close to 50 some of these days.
 
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Old 02-23-2007, 08:43 PM
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Default RE: Ok time to get to the bottom of this!

Dont you have new wheels? If they are much heavier than your stock wheels then youd notice a difference in mpg. Other than that, if your 02 sensor wasnt doing its job youd have a fault code if not a cel for it. What spark plugs did you switch to?
 
  #3  
Old 02-23-2007, 08:45 PM
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Default RE: Ok time to get to the bottom of this!

Per your instructions BK6REs or whatever you call them!

Oh and also, the new wheels aren't a lot heavier than the stock ones, I was pleasantly surpised, considering they are 3" bigger! [8D]
 
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Old 02-23-2007, 08:48 PM
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Default RE: Ok time to get to the bottom of this!

How are you calculating your mpg?
 
  #5  
Old 02-23-2007, 08:50 PM
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Default RE: Ok time to get to the bottom of this!

Not by the computer, if that is what you are suggesting. In fact I have a 99.5 so I don't even have that!

The way everyone does it, Miles driven/gallons put into tank.
 
  #6  
Old 02-23-2007, 08:54 PM
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Default RE: Ok time to get to the bottom of this!

fuel filter?
 
  #7  
Old 02-23-2007, 08:54 PM
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Default RE: Ok time to get to the bottom of this!

I dont know man... Sell your car [&:]
 
  #8  
Old 02-23-2007, 08:56 PM
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Default RE: Ok time to get to the bottom of this!

I have heard people suggest fuel filter, but I have heard other people say that shouldn't be a problem... Don't ask me?

I dont know man... Sell your car
Thanks for giving up on me man...[]
 
  #9  
Old 02-23-2007, 09:00 PM
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Default RE: Ok time to get to the bottom of this!

It might be the fuel filter, but its doubtful with your low mileage.I would wait until the weather warms up a little more and see if it improves before you spend any money replacing something that may not be the culprit. Whens the last time you replaced your air filter?
 
  #10  
Old 02-23-2007, 09:08 PM
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Default RE: Ok time to get to the bottom of this!

With the spark plugs, remember when you helped me with that? Anyway, that was like less than 1500 miles ago.
 


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