11mpg on fox w/ only bolt ons???

M

madonionrs

New Member

Jun 7, 2003

250

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0

Buffalo NY

Feb 25, 2004

#1

• Feb 25, 2004

• #1

I have a 89Covt AOD. 89,000miles 125 miles to the tank????
Mods: 3.73(same with 2.73) exaust work...
Seems to be running good, although I'm kinda a car n00b in experience sector.

I don't smell gas anywhere and I had the car dynoed and the curve was pretty smooth except for a slight dip at 1-3k

 

Black Sun 5.0

Founding Member

Mar 23, 2002

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L.I., N.Y.

Feb 25, 2004

#2

• Feb 25, 2004

• #2

Give it a full tune-up and replace the O2's. Maybe run diags. It's a start. I have a similar issue, but not as bad as yours.

 

M

madonionrs

New Member

Jun 7, 2003

250

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0

Buffalo NY

Feb 25, 2004

#3

• Feb 25, 2004

• #3

Black Sun 5.0 said:

Give it a full tune-up and replace the O2's. Maybe run diags. It's a start. I have a similar issue, but not as bad as yours.

Click to expand...

Yeah... I put in some autolite 24s, fuel filter, k&n, cap&roder and bought a new iab (bad idle)

I'll have to replace the O2s.... You think they would make that much of a difference

 

S

StreetStang37

Founding Member

Apr 23, 2001

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San Jose, CA

Feb 25, 2004

#4

• Feb 25, 2004

• #4

you should be able to get atleast 15-16. I get 20-22 mpg on the freeway and 12.5-15 on the street and thats with just about all the bolt ons you can get + heads + cam and gears.

 

johnt785

Member

Jan 22, 2004

158

3

18

Wichita, Kansas

Feb 25, 2004

#5

• Feb 25, 2004

• #5

Try filling up your tank twice and doing the math over again. You know just to make sure the 11 mpg was the correct out come.

 

M

madonionrs

New Member

Jun 7, 2003

250

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0

Buffalo NY

Feb 25, 2004

#6

• Feb 25, 2004

• #6

StreetStang37 said:

you should be able to get atleast 15-16. I get 20-22 mpg on the freeway and 12.5-15 on the street and thats with just about all the bolt ons you can get + heads + cam and gears.

Click to expand...

Lol, I don't have any engine work done and my VERY BEST street mpg was 16.9 w/2.73s. Now my best is 130m or 140miles to the tank (which is what.. 13mpg?)

 

SuperStang83

Founding Member

Mar 21, 2001

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49

Boyertown, Pa

Feb 25, 2004

#7

• Feb 25, 2004

• #7

When my 87' was stock I got 23 around town and 30mpg on the highway!

Jakob

 

S

Silentst2000

New Member

Sep 28, 2003

145

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0

Feb 25, 2004

#8

• Feb 25, 2004

• #8

SuperStang83 said:

When my 87' was stock I got 23 around town and 30mpg on the highway!

Jakob

Click to expand...

That's better than my 94 v6 can do...

 

Cue-Ball

New Member

Jul 22, 2003

316

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0

Kirkland, WA

Feb 25, 2004

#9

• Feb 25, 2004

• #9

Both of my cars have stock engines. No real mods other than cat-back exhaust. For my daily use i only get about 14-15 mpg from each of them (one auto, one stick). Driving around town is just killer on gas mileage. I've gotten 25mpg before with my auto on the highway. Never really taken the manual car on a long trip to determine highway mileage, but i'm guessing 22mpg would be the best i could expect.

When you got your car dynod, did you have an EGA hooked up? If not, that's something you can try that would be pretty inexpensive ($50 or so for a dyno run with EGA). That should tell you if you're running rich or not. If you ARE, then you can start diagnosing. Maybe your O2 sensors need replaced or maybe you're stuck in closed loop mode. If the EGA comes out at around 12:1 or so, then you just have to accept that you're not driving a fuel efficient car.

 

M

madonionrs

New Member

Jun 7, 2003

250

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0

Buffalo NY

Feb 25, 2004

#10

• Feb 25, 2004

• #10

When I had my car dynoed they didn't use a EGA. I went their on their Autumn festival ($25 pulls)
A full dyno is like $89 here in Buffalo

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,248

17,929

224

Massachusetts

Feb 25, 2004

#11

• Feb 25, 2004

• #11

I only get 150 miles per tank with my car.

But i blame it on the way i drive.

 

Black Sun 5.0

Founding Member

Mar 23, 2002

1,337

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36

L.I., N.Y.

Feb 25, 2004

#12

• Feb 25, 2004

• #12

What would cause a car to get stuck in closed loop and how could you tell? It's a shame how so many people on this board seem to have incurable gas mileage problems for no good reason at all and despite the combinaton of both time and money, the problem never gets resolved. Or, at least rarely.

 

bmo37

Founding Member

Jun 27, 2001

2,368

2

46

New Jersey

Feb 25, 2004

#13

• Feb 25, 2004

• #13

before my heavy mods my stang got 10-12mpg total lucky to get 200miles (usually160-180) out of a full tank. I only had, full exhaust and intake, puleys, maf, put new o2's tune up, everything but couldn't solve the problem stang still gets the same milage now with the engine stroked go figure

 

Black Sun 5.0

Founding Member

Mar 23, 2002

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36

L.I., N.Y.

Feb 25, 2004

#14

• Feb 25, 2004

• #14

I used to get 27 hwy, 20-22 city. I'm now down to 14 MPG EVERYWHERE. The elusiveness of this problem is frustrating. Where's Ford when you need them?