4.5 Gallons......56.5 miles

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custom89stang

New Member

Dec 9, 2003

705

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Seattle, WA

Aug 12, 2005

#1

• Aug 12, 2005

• #1

4.5 Gallons......56.5 miles you heard that right, how many MPG is that? my mechanic said im running rich (black smoke constantly out of the tail pipe) and my check engine light isnt on so i dont think its the 02 sensors....sooo?!?!?!? my usually driving RPM range is 1500-2500 just so u know i have stock 2.73 gears...any other possibilities?

 

mustangjoe87

Member

Jul 23, 2004

364

0

16

Harrison Twp., Michigan

Aug 12, 2005

#2

• Aug 12, 2005

• #2

thats 12.5 mpg, the light doesnt always go on when your O2's are getting bad

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

33

129

Aug 12, 2005

#3

• Aug 12, 2005

• #3

If for instance, you drive 10 mins each trip, that is not bad milage (due to fuel trim given the motor's temps). But if that is after sustained non-flog driving, something could probably be done.

You really need to drive more miles between fill ups to get a real idea.
Good luck.

 

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89blkgt

New Member

Aug 1, 2004

38

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0

west springfield

Aug 12, 2005

#4

• Aug 12, 2005

• #4

Consider urself lucky man, My daily driver only gets 38-40tops miles to a 4.5 gallon refill it sucks bad. 30lb injectors with 42psi pressure. whats is yours??
Tim

 

M

Mysterio

New Member

Oct 6, 2004

101

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0

Lakewood, Ohio

Aug 13, 2005

#5

• Aug 13, 2005

• #5

My mustang gets ~20 mpg on the highway and ~10 in the city.

 

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jeffs89gt

New Member

Jul 18, 2005

83

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0

Aug 13, 2005

#6

• Aug 13, 2005

• #6

i got 21.4 mph comin home from school yesterday. 181 miles for 8.5 gallons of gas. i usily get 17 around town.

 

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TheUser

Active Member

Jul 25, 2003

1,859

1

36

Springfield, MO

Aug 13, 2005

#7

• Aug 13, 2005

• #7

Well, I suppose you could possibly have a leaking injector or two? That would cause the rich condition, which causes the low mpg.

Otherwise, is your MAF stock w/ stock injectors? I looked in your sig and didn't see any MAF or Injector mods, but just making sure.

Are you sure your check engine light works? Some people black them out (previous owners) so you can't see codes. Maybe your O2's are on the verge of going out and just haven't gotten out of spec yet?

Do you let the car idle a lot? Like start it up and just sit in it running or idle a lot while working on it or sit in a lot of traffic lights? That causes bad mpg too - because you're burning gas (maybe not a lot), but you aren't moving.

 

jruppert

Founding Member

Oct 20, 2001

294

1

19

Michigan

Aug 13, 2005

#8

• Aug 13, 2005

• #8

I can usually get around 100 miles on $10 of gas which calculates to around 4.5 gallons.

 

Michael Yount

Mustang Master

Apr 10, 2002

9,039

6

79

Charlotte, NC

Aug 13, 2005

#9

• Aug 13, 2005

• #9

custom89 - please tell us that you know how to calculate your mpg from 56.5 MILES and 4.5 GALLONS. Miles/gallon --- just divide 56.5 by 4.5. That's what mustangjoe did to arrive at 12.5.

First thing to do is to pull the codes....

 

5spd GT

"the 5.0 owns all"

Founding Member

Aug 7, 2002

9,516

6

99

Arkansas

Aug 13, 2005

#10

• Aug 13, 2005

• #10

HISSIN50 said:

If for instance, you drive 10 mins each trip, that is not bad milage (due to fuel trim given the motor's temps). But if that is after sustained non-flog driving, something could probably be done.

You really need to drive more miles between fill ups to get a real idea.
Good luck.

Click to expand...

I agree

custom89stang - It's okay about not knowing how to configure the gas mileage numbers...we all get brain toots here and there

 

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WhiteHeat306

Member

Nov 28, 2004

283

1

16

Philadelphia Suburbs

Aug 13, 2005

#11

• Aug 13, 2005

• #11

Please....back when I was commuting back and forth into Philly every day for college I was lucky to get 100 miles out of a tank. Now I have a job where I'm on the turnpike a lot, and I average 140 miles per tank. Also keep in mind that my car is tuned for 93 octane. Yesterday I paid $2.85 per gallon .

 

Foxfan88

My Grandpa has great wood.

Sep 13, 2004

2,487

4

0

Miami, Ok

Aug 13, 2005

#12

• Aug 13, 2005

• #12

my car used to get 10 in town, i tuned it up and stuff and with an easy foot i get around 15 now so thats 200miles to a full tank.

 

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custom89stang

New Member

Dec 9, 2003

705

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0

Seattle, WA

Aug 15, 2005

#13

• Aug 15, 2005

• #13

i know how too calculate it now, i just wasnt sure it was correct cause thats offly low for a fairly stock car.....it was some highway driving too...wtf

 

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custom89stang

New Member

Dec 9, 2003

705

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0

Seattle, WA

Aug 15, 2005

#14

• Aug 15, 2005

• #14

i know my car is running rich cause even at idle my car has black smoke coming out of the tail pipes (no cats) so i was just seeing what else it could be since the 02 sensors are good because the check engine light hasnt came on....my check engine light DOES Work

 

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speedytang

Founding Member

Jul 28, 1999

765

1

17

Marengo,Ohio,US

Aug 15, 2005

#15

• Aug 15, 2005

• #15

Pull codes to see if your getting O2 errors or other errors saved in the computer. You could be missing the light flashing.

 

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custom89stang

New Member

Dec 9, 2003

705

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Seattle, WA

Aug 15, 2005

#16

• Aug 15, 2005

• #16

ok

 

Michael Yount

Mustang Master

Apr 10, 2002

9,039

6

79

Charlotte, NC

Aug 15, 2005

#17

• Aug 15, 2005

• #17

Let us know what codes come up -- if the O2's are working correctly, it's likely one of the other sensors that are out of whack -- ACT, ECT or something wrong with the maf signal. Have you changed anything or done any work on it recently?

I just filled mine - an around town tank - 200.4 miles; 8.8 gallons.

 

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custom89stang

New Member

Dec 9, 2003

705

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0

Seattle, WA

Aug 16, 2005

#18

• Aug 16, 2005

• #18

changed temp. sensor, im having lean popping problems as you know already..... but i know it is a possibility i fried EEC twice.... i dropped a tool on both posotive and negative of the battery, the only thing is, that didnt even fry my stereo system or nothing...so i dont think thats what happened

 

Michael Yount

Mustang Master

Apr 10, 2002

9,039

6

79

Charlotte, NC

Aug 16, 2005

#19

• Aug 16, 2005

• #19

Hope you figure it out and get it working the way you want.

By the way - there's a reason that rule number 1 when you open the hood to work on the car (yes, even an oil change) is to disconnect the battery ground cable.....

 

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custom89stang

New Member

Dec 9, 2003

705

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Seattle, WA

Aug 16, 2005

#20

• Aug 16, 2005

• #20

okay thank you! i will take that to heart (you are one of my idols here