Go Back   EcoModder Forum > EcoModding > Hypermiling / EcoDriver's Ed
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 01-10-2009, 05:36 PM   #1 (permalink)
EcoModding Lurker
 
JRK5150's Avatar
 
Join Date: Jan 2009
Location: Spring Hill, Florida
Posts: 17
Thanks: 0
Thanked 0 Times in 0 Posts
Question Mustang neutral coasting? (in Ford Mustang V6 automatic)

I tried posting this in another part of the forums, but I got no replies, so I'll try over here.
I'm just starting in my quest for much better fuel economy. I'm driving a '94 mustang convertible equipped with a 3.8 liter v6 and an auto tranny. I'm wondering if any one has tried neutral coasting with the AodE trans? I don't want to kill it!
Also, can any one tell me if this car is equipped with a fuel cutoff when I take my foot off the gas?
I'll be ordering a scanguage here soon for more accurate monitoring. Any help will be greatly appreciated! Thanks in advance!!

-John

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 01-10-2009, 06:38 PM   #2 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,813

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 53.56 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 61.46 mpg (US)
Thanks: 3,519
Thanked 6,307 Times in 3,264 Posts
Every modern fuel injected car has fuel cutoff under certain conditions.

Coasting in neutral - you can almost certainly do it with the engine running, without damaging anything. As for shifting back into gear, I'm not so sure. Maybe someone with more experience driving the Fords can jump in here.

Coasting in N with the engine OFF requires that the transmission can be "flat towed" (drive wheels on the ground) in N. Otherwise you could be risking damage due to lack of lubrication.
__________________
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now in progress...
Ecodriving test:
Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Old 01-10-2009, 06:38 PM   #3 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,813

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 53.56 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 61.46 mpg (US)
Thanks: 3,519
Thanked 6,307 Times in 3,264 Posts
PS - you'll love the ScanGauge. Fun fun.
__________________
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now in progress...
Ecodriving test:
Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Old 01-10-2009, 07:31 PM   #4 (permalink)
EcoModding Lurker
 
JRK5150's Avatar
 
Join Date: Jan 2009
Location: Spring Hill, Florida
Posts: 17
Thanks: 0
Thanked 0 Times in 0 Posts
Thanks MetroMPG! I am pretty excited about the scanguage. I'll be ordering it as soon as I save up enough. I checked my owner's manual and am a bit confused. It says the car can be towed in neutral, but says to keep the speed below 35 and not to drive more than 50 miles or transmission damage may occur. Under what conditions will the fuel cutoff be activated?
  Reply With Quote
Old 01-10-2009, 08:04 PM   #5 (permalink)
Master EcoModder
 
gascort's Avatar
 
Join Date: Jun 2008
Location: Saint Louis, MO
Posts: 548

Gascort RIP - '93 Ford Escort Wagon
90 day: 43.01 mpg (US)

WifesCruze - '11 Chevrolet Cruze LT
90 day: 31.1 mpg (US)
Thanks: 14
Thanked 25 Times in 16 Posts
Pretty much anytime you're using the transmission to slow you down ever so slightly(on a downhill) or if the car doesn't require the engine to be loaded to maintain speed when coasting.
Sounds like the AODE can't be flat towed. Bummer.
What MPGs do you get in that? My '95 GT got about 21 for my everyday commute when I drove fairly reasonably. My lowest ever was 18, and my highest ever was 23 (all highway in 5th gear)
btw, you can swap transmissions in that beast fairly easily, but I don't know that you'd be able to EOC anyway, even with a 5spd - I destroyed the rag joint in my steering shaft by turning the car without the power steering on just a few times, and it was HARD!
__________________
Gasoline, Wind, Solar, Gravity Hybrid-to-be! http://www.scientificmethodfueleconomy.blogspot.com/
  Reply With Quote
Old 01-10-2009, 08:21 PM   #6 (permalink)
Master EcoModder
 
Join Date: Sep 2008
Location: Fort Worth, Texas
Posts: 356

Silver Turtle - '02 Ford Focus Zx3
90 day: 38.83 mpg (US)
Thanks: 4
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by gascort View Post
I destroyed the rag joint in my steering shaft by turning the car without the power steering on just a few times, and it was HARD!
Did you loop the lines? Add a breather? Or just disconnected the belt?
  Reply With Quote
Old 01-11-2009, 10:46 PM   #7 (permalink)
EcoModding Apprentice
 
Join Date: May 2008
Location: Bono, AR
Posts: 170

Daily Driver - '01 Ford Explorer Sport
90 day: 18.12 mpg (US)
Thanks: 0
Thanked 1 Time in 1 Post
Send a message via Yahoo to Tony Raine
on my 2001 ford explorer sport (5r55e auto trans, the AODE/A4LD's replacement), here are my observations:

EOC = bad idea
N-coasting (engine on) = ok, if under 35 mph
"rev matching" (to go back into gear from N) = bad idea


when i coast to a stop sign/red light, i shift into N right under 35 mph. if i stop, i leave it in N, but shift into D when i know i'll have at least 3 full seconds for the trans to "find" gear, without pressing the gas. same if i have to take off again without stopping. shift into D, wait 3 sec, then start lightly on the gas.


btw, i came to these conclusions based on what didn't make my trans bang and jerk horribly into gear.
__________________
My Intro
  Reply With Quote
Old 01-12-2009, 11:22 AM   #8 (permalink)
EcoModding Lurker
 
Join Date: Dec 2007
Location: Central Arkansas
Posts: 32
Thanks: 0
Thanked 2 Times in 2 Posts
You might try some easy mods first. Here are some that come to mind:

1. Replace rear end lube with a pure synthetic replacement. (reduced friction)
2. Increase tire pressure to 10% over door label recommendation. (reduced rolling resistance)
3. As you are driving a 10+ year old car, you might consider replacing all vacuum hoses. Any vacuum leak really upsets the idle quality and gas mileage.
4. Clean the intake assembly and throttle body as well.
5. If it hasn't already been done, perform a thorough tune-up on the car using high quality replacement components.
6. Switch to synthetic (or Motorcraft synthetic blend) motor oil of the recommended weight. (reduced friction)
7. Thoroughly wash/clean the entire vehicle, including the underside. (reduce weight - grime is heavy)
8. Remove any unnecessary items from your vehicle, or replace with light-weight items. Donut spare intead of full-size, 5 pound tool kit instead of 50 pound tool kit, etc.


9. The Scangauge is a very useful tool for improving your driving habits. If you are on a tight budget, maybe you could look around and find a used Scangauge I for sale.

10. If you still have the original O2 sensors on the car, you will want to consider replacing them, although that can get pricey.


Good luck.

Wayne
  Reply With Quote
Old 01-14-2009, 01:53 AM   #9 (permalink)
Depends on the Day
 
RH77's Avatar
 
Join Date: Nov 2007
Location: Kansas City Area
Posts: 1,761

Teggy - '98 Acura Integra LS
Sports Cars
90 day: 32.74 mpg (US)

IMA - '10 Honda Insight EX
Team Honda
90 day: 34.76 mpg (US)

Tessie - '06 Acura TSX Base
90 day: 28.2 mpg (US)
Thanks: 31
Thanked 41 Times in 35 Posts
I've driven a few Mustangs lately and noticed that they like don't like to tach-down between shifts or on decel, so fuel-cut may be reduced (similar to some Tarurus models). Do you experience that or is there a fix? The worst was on an '04 (?) Mach-1 manual.

-Rick
__________________
“If we knew what we were doing, it wouldn't be called research” ― Albert Einstein

_
_
  Reply With Quote
Old 01-14-2009, 10:54 AM   #10 (permalink)
Master EcoModder
 
metroschultz's Avatar
 
Join Date: Dec 2007
Location: Norfolk, Va. USA
Posts: 869

CPT SLO - '93 GEO Metro plainjane
90 day: 53.91 mpg (US)

SilverHairBeauty - '01 Toyota Avalon XL
90 day: 24.06 mpg (US)
Thanks: 14
Thanked 33 Times in 28 Posts
Send a message via AIM to metroschultz
Before you spend money on a Scan Gage, check and make sure your 1994 'Stang is OBDII compatible.
I believe the older Fords were still running EEC4 at that time which is NOT OBDII.
Just a little insight,
Schultz

__________________


When you are courting a nice girl an hour seems like a second. When you sit on a red-hot cinder a second seems like an hour. That's relativity.
Albert Einstein
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Does coasting in neutral or coasting in gear save more gas? xbUser Hypermiling / EcoDriver's Ed 19 10-19-2008 02:28 PM
Coasting in Neutral... what if you can't come to a full stop after? Sean T. Hypermiling / EcoDriver's Ed 16 10-08-2008 01:11 PM
Coasting in Neutral Vs. Coasting in Drive observation fonque Hypermiling / EcoDriver's Ed 21 07-17-2008 04:49 PM
1998 Ford Mustang V6. Stanger98 Introductions 11 07-04-2008 07:27 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com