Gas Mileage Problems

9

97Vicious281

New Member

Jul 21, 2005

35

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Atlanta, GA

Mar 6, 2006

#1

• Mar 6, 2006

• #1

This has been getting worse as time goes on back in late July I changed out the plugs and wires thinking I would get better gas mileage. Wrong. It has progressively gotten worse from like 320 miles to a tank to like 280 and now it flucuates from 220-260 since I got flowmaster mufflers installed. Any suggestions on what to do. It's really starting to get increasingly annoying considering gas is about to go up again.

 

K

Kilgore Trout

Fried or Broiled ?

10 Year Member

Mar 30, 2005

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Mar 6, 2006

#2

• Mar 6, 2006

• #2

What is this gas "mileage" thing of which you speak? Is that a gasoline additive that makes the car go faster?

Seriously though a lot of things affect this including the fact that cars get worse mileage in cold weather.

How many miles on your fuel filter?

 

9

97Vicious281

New Member

Jul 21, 2005

35

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0

Atlanta, GA

Mar 6, 2006

#3

• Mar 6, 2006

• #3

I don't think the fuel filter has ever been changed. It's got 95000 miles on it. All I did was change the spark plugs and plug wires then it got like 40 to 50 miles less a tank. Then I got flows and now I get like another 30 less.

 

sgarlic

Founding Member

Apr 21, 2001

3,085

1

56

Mar 6, 2006

#4

• Mar 6, 2006

• #4

Change the fuel filter asap. You sure you gapped the plugs correctly? If you are reading this and thinking "They come pre-gapped!" .. they still need to be checked anyway.

 

K

Kilgore Trout

Fried or Broiled ?

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Mar 30, 2005

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Mar 6, 2006

#5

• Mar 6, 2006

• #5

Fuel filter is good for 30k

 

timeless2

Vi Veri Veni Versum Vicus Vici

Admin Dude

Nov 29, 1999

1,366

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the Shadow Gallery

Mar 6, 2006

#6

• Mar 6, 2006

• #6

97Vicious281 said:

I don't think the fuel filter has ever been changed. It's got 95000 miles on it.

Click to expand...

Wow. Get it changed, regardless of whether it is the true problem or not.

 

Mike97gt

it doe snot

Founding Member

Jan 26, 1999

10,633

7

89

the people's republic of massachusetts

Mar 6, 2006

#7

• Mar 6, 2006

• #7

i agree change that fuel filter.

 

vertigasen

Active Member

Apr 28, 2004

366

18

29

Falcon, CO

Mar 6, 2006

#8

• Mar 6, 2006

• #8

#1 - Change the fuel filter!!!!

#2 - My fuel mileage has always dropped for a while after I changed a part of my exhaust. Not because of the exhaust, mind you, but because I didnt shift as early as I used to. I just wanted to hear the sound of the exhaust. When I did the cat-back, I found myself turning down the radio at stoplight just so I could get on it. After a month or so, that got old, but then again after I did the LTs and the O/R X I did the same thing. Are you doing this? That will cut an ass load out of your MPG, I dropped from 280 miles on a tank to almost 220, but after I would quit, right back up to 280.

Just my .02 tho......

 

9

97Vicious281

New Member

Jul 21, 2005

35

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Atlanta, GA

Mar 7, 2006

#9

• Mar 7, 2006

• #9

Yeah I gapped them right but the ones I took out were gapped like 10 less and got better mileage. The mufflers only took about 30-40 miles off.

 

9

97Vicious281

New Member

Jul 21, 2005

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0

Atlanta, GA

Mar 7, 2006

#10

• Mar 7, 2006

• #10

Is changing the fuel filter an easy do it yourself job.

 

K

Kilgore Trout

Fried or Broiled ?

10 Year Member

Mar 30, 2005

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Mar 7, 2006

#11

• Mar 7, 2006

• #11

http://www.bullittarchive.com/1009.htm

 

timeless2

Vi Veri Veni Versum Vicus Vici

Admin Dude

Nov 29, 1999

1,366

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the Shadow Gallery

Mar 7, 2006

#12

• Mar 7, 2006

• #12

Kilgore Trout said:

http://www.bullittarchive.com/1009.htm

Click to expand...

Good link, Trout.
I was busy banning at the time and didn't post the thread response I had started until you had alread posted.

 

Mike97gt

it doe snot

Founding Member

Jan 26, 1999

10,633

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the people's republic of massachusetts

Mar 7, 2006

#13

• Mar 7, 2006

• #13

4u2nv said:

Good link, Trout.
I was busy banning at the time and didn't post the thread response I had started until you had alread posted.

Click to expand...

would that be confused you were banning

 

W

white-04

New Member

Apr 1, 2005

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Owings, MD

Mar 8, 2006

#14

• Mar 8, 2006

• #14

I'd say give it some time. I think mine dropped too when I first put in Borlas. Also, check your tire pressure. Make sure you're not running on 20lbs. or something.

Edit: Or maybe you were real lean back then where you were getting 320. You had a CAI to get the air in but no exhaust mod. Only time I (5speed 04 gt) get above 300 on a tank is on a road trip. Generally, I am around 260-280 per tank. Just got a tune, so I'm going to be checking again.