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2005 impala gas mileage question
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racermpn
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PostPosted: Thu Oct 29, 2009 11:05 pm    Post subject:  2005 impala gas mileage question Reply with quote

Hi everyone. Just purchased a 2005 base impala. The dealer put only a half a tank of fuel in it. It seemed like every time I looked at the guage it moved down a whole line. I did not reset trip to see how many miles till after it did it a couple of times. My question is does the gauge move faster once its past the half way mark. Or do I have a fuel consumtion problem. The car has 65,800 miles on it.
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PostPosted: Thu Oct 29, 2009 11:11 pm    Post subject:   Reply with quote

It could be any number of things. try changing the fuel filter and see if that helps.

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PostPosted: Thu Oct 29, 2009 11:19 pm    Post subject:   Reply with quote

Gas Gauge could be on the fritz. Unless you drive hard.

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PostPosted: Thu Oct 29, 2009 11:39 pm    Post subject:   Reply with quote

On my '05 the actual half tank hits right around 3/4 on the gauge. (when freeway driving at least). Obviously your driving conditions and environment are different than mine, I usually see 350-420 miles on a tank depending on how much freeway cruise I run and ambient temps.

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PostPosted: Thu Oct 29, 2009 11:44 pm    Post subject:   Reply with quote

From full and depending on just how full you get it...it shouldn't move until you have between 60-80 miles on it with city driving...highway driving i have gone as much as 130 miles before it has moved from full with the base 3.4L. After that it progresses pretty normally, but it will move faster once it gets to 1/2 tank and below. I can't say that your movement is normal or not because I can't see it myself. If your car was senior owned and driven(being a base likely was) it might be good to seafoam it and drive it like you stole it for a little while to get the cobwebs blown out. My 3.4L consistently gets 38-40mpg highway and about 22-25 city driving. You can search for "seafoam" to find out just how to do this procedure...it really does work.

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PostPosted: Thu Oct 29, 2009 11:49 pm    Post subject:   Reply with quote

With nearly every car I've owned, the second half of the gas tanke moved faster than the first.

My Crown Vic, will get to 220 miles before reaching the half mark. Then I'll get 360 miles to the entire tank. The difference is pretty dramatic in the halves.

My 08 Impala SS does the same, just not as dramatic.

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PostPosted: Fri Oct 30, 2009 2:37 am    Post subject:   Reply with quote

CenTexSS wrote:
The second half of the gas tanke moved faster than the first.



The same thing happens to me with the impala, with the malibu the gauge move slowly until the last quart of gas then it moves very quick.
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PostPosted: Fri Oct 30, 2009 8:37 am    Post subject:   Reply with quote

my 01 base does the same thing. It takes around 70 miles after I top it off to get to the full line. Then around 250 miles to get to the 1/2 way mark. But I only get around 450 miles to a tank. Its a steady climb down once its starts at the full line but its seems like it drops faster.
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PostPosted: Sat Oct 31, 2009 7:28 pm    Post subject:  Re: 2005 impala gas mileage question Reply with quote

racermpn wrote:
Hi everyone. Just purchased a 2005 base impala. The dealer put only a half a tank of fuel in it. It seemed like every time I looked at the guage it moved down a whole line. I did not reset trip to see how many miles till after it did it a couple of times. My question is does the gauge move faster once its past the half way mark. Or do I have a fuel consumtion problem. The car has 65,800 miles on it.


I took a 1900 mile highway trip with my 3400 04 Impala and the total gas mileage for the 1900 miles was 31.4 mpg


Last edited by DUNTOV on Sat Oct 31, 2009 10:49 pm; edited 1 time in total
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PostPosted: Sat Oct 31, 2009 7:31 pm    Post subject:   Reply with quote

ad0726 wrote:
CenTexSS wrote:
The second half of the gas tanke moved faster than the first.



The same thing happens to me with the impala, with the malibu the gauge move slowly until the last quart of gas then it moves very quick.


Every W-body I have driven (2 intrigue, a GP and a Monte Carlo) had the fuel guage static for the first 75 miles, then it starts to move faster and faster as it gets closer to empty.

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PostPosted: Sat Oct 31, 2009 8:40 pm    Post subject:   Reply with quote

IffyG wrote:

Every W-body I have driven (2 intrigue, a GP and a Monte Carlo) had the fuel guage static for the first 75 miles, then it starts to move faster and faster as it gets closer to empty.


True, my sister used to own a GP GTP and the gauge moved faster and faster just like you said
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PostPosted: Sat Oct 31, 2009 10:01 pm    Post subject:   Reply with quote

The bottom half of the gauge is going to go faster due to the shape and curvature of the tank. It curves more at the bottom around the exhaust parts, so it's narrower. If it's narrower, it's going to drain faster.

Also, the cluster does not display the tank level in a linear way. If you could see what the PCM is reading as the fuel level percentage and compare that to the fuel gauge, you'd see how it's really working. It makes the bottom half go faster so you will go buy fuel.

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PostPosted: Sat Oct 31, 2009 10:12 pm    Post subject:   Reply with quote

Ha and I thought at half a tank you get get better mpgs because of less weight. Laughing

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How much miles are on those seats? How much pounds of ass were applied to the seat during every trip? Lol

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PostPosted: Sat Oct 31, 2009 11:18 pm    Post subject:   Reply with quote

PushrodPower wrote:
Ha and I thought at half a tank you get get better mpgs because of less weight. Laughing


well, you would, just dont have as much gas to experience them with.

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PostPosted: Sun Nov 01, 2009 3:22 am    Post subject:   Reply with quote

Also remember you can't use all the gas in your tank. I guess you could if you wanted to run out of gas, but the light comes on with something like 2.5-3 gallons left in the tank.

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