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  • SN95 4.6L Mustang Tech

Real Bad gas Mileage.

  • Thread starter Thread starter justinschmidt1
  • Start date Start date Dec 5, 2007
J

justinschmidt1

Member
Jun 15, 2005
349
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Dec 5, 2007
#1
  • Dec 5, 2007
  • #1
So I have a 96 gt...mods in sig...

I drove real slow and reserved trying to get good gas mileage and there was a fairly high amount of highway driving...cruising at 60-70 mph less than 2500 rpms at all times.

Ive got about 170 miles to most of my tank which was 13 gallons. I have like 1/8 tank left so even if I get about 200 miles to the tank, thats 15 mpg with real easy and a lot of highway driving...

I thought there was people getting like 22-24 mpg on the highway with a 4.6?

Any body else getting bad mileage like me?

Could it be my spark plugs or something causing it?

Ive been hearing a sound that sounds like a ping ping ping but its not pinging..maybe one of my plugs isnt really igniting the fuel?
 

forum155pl

New Member
Jul 11, 2006
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the 509
Dec 5, 2007
#2
  • Dec 5, 2007
  • #2
i usually get 200 per tank if i'm on it half the time and easy on it half..
 
J

justinschmidt1

Member
Jun 15, 2005
349
0
16
Dec 5, 2007
#3
  • Dec 5, 2007
  • #3
justinschmidt1 said:
So I have a 96 gt...mods in sig...

I drove real slow and reserved trying to get good gas mileage and there was a fairly high amount of highway driving...cruising at 60-70 mph less than 2500 rpms at all times.

Ive got about 170 miles to most of my tank which was 13 gallons. I have like 1/8 tank left so even if I get about 200 miles to the tank, thats 15 mpg with real easy and a lot of highway driving...

I thought there was people getting like 22-24 mpg on the highway with a 4.6?

Any body else getting bad mileage like me?

Could it be my spark plugs or something causing it?

Ive been hearing a sound that sounds like a ping ping ping but its not pinging..maybe one of my plugs isnt really igniting the fuel?
Click to expand...



Also Ive gotten 250+ miles to the tank before not being easy on the car either...
 

Superhereaux

chicks make me feel inadequate
Founding Member
Jul 30, 2002
538
3
59
South Texas
Dec 5, 2007
#4
  • Dec 5, 2007
  • #4
sounds like it's in need of a tune up.

spark plugs, air filter, fuel filter, trans flush, coolant flush (just because) and throw in a brake flush for good measure

my 'o2 will get almost 30mpg straight highway, 15 straight city and around 19 mixed
 

lvmustanggt

New Member
Apr 9, 2006
721
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0
Las Vegas
Dec 5, 2007
#5
  • Dec 5, 2007
  • #5
worse I got is 12.9 mpg, that's why I drive my wife's 07 vw jetta to work . My wife don't need her car right now cause it is due with our baby dec 13 so she stays home.
 

Spro

New Member
Nov 3, 2007
73
0
0
IL
Dec 5, 2007
#6
  • Dec 5, 2007
  • #6
Don't forget cars use a little more gas when it's cold out. I don't drive my stang in the winter but my truck usually gets 18mpg but now that it's cold im lucky to see 15mpg.
 
J

justinschmidt1

Member
Jun 15, 2005
349
0
16
Dec 5, 2007
#7
  • Dec 5, 2007
  • #7
Superhereaux said:
sounds like it's in need of a tune up.

spark plugs, air filter, fuel filter, trans flush, coolant flush (just because) and throw in a brake flush for good measure

my 'o2 will get almost 30mpg straight highway, 15 straight city and around 19 mixed
Click to expand...



Yea, well my air filter is the one that came with my jlt which is like 10 inches long...I guess it could need to be cleaned...it hasnt been cleaned in a year.

Trans has brand new fluid in it, brake flush was just flushed wit new front brakes, coolant flushed a litle while ago.

I need to do spark plugs and fuel filter...i was gonna do the fuel filter but it looked like it was brand new when i looked under the car when I bought it with 88k on the clock.
 

Winters98GT

Whoop...whoop-whoop-whoop-whoop...GANGNAM STYLE!!!
Founding Member
Nov 29, 1999
5,520
1,291
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H Town
Dec 5, 2007
#8
  • Dec 5, 2007
  • #8
proboly a bad 02 sensor
 
J

justinschmidt1

Member
Jun 15, 2005
349
0
16
Dec 5, 2007
#9
  • Dec 5, 2007
  • #9
Winters98GT said:
proboly a bad 02 sensor
Click to expand...


I would hope not...considering they are pretty much brand new..like 5k miles ago.
 

Winters98GT

Whoop...whoop-whoop-whoop-whoop...GANGNAM STYLE!!!
Founding Member
Nov 29, 1999
5,520
1,291
224
H Town
Dec 5, 2007
#10
  • Dec 5, 2007
  • #10
justinschmidt1 said:
I would hope not...considering they are pretty much brand new..like 5k miles ago.
Click to expand...

proboly not then, they generally last about 80k, give or take. I had a pair last 20k, and another last 140k.
 

topless98gt

Adhesive Feces
Mar 31, 2005
182
0
17
Arlington, TX
Dec 6, 2007
#11
  • Dec 6, 2007
  • #11
I've gotten up to 28mpg on the highway, steady 65mph on cruise control for 1.5 hours.

Since the 3.73s, I've been getting at most, 22mpg on highway, 9-15mpg city.

My father's Prius gets 54mpg usually, depending on wind conditions
 

COramprat

...I can take it. I think.
20+ Year Stangneter
Mar 2, 2003
8,474
1,463
223
Sea of Tranquility
Dec 6, 2007
#12
  • Dec 6, 2007
  • #12
Mine has been up and down. Sometimes I get around 22 and others it is around 18. There is something amiss and it could be any number of things. The basic tune-up my take care of your problem.
 
J

justinschmidt1

Member
Jun 15, 2005
349
0
16
Dec 6, 2007
#13
  • Dec 6, 2007
  • #13
it doesnt seem right that I get like 250 miles to a tank getting on it a lot then get 200 miles to a tank babying to see how much miles I get to the tank.

I need a electric motor haha.
 
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