Install a vacuum gauge for better mpg? - Fuelly Forums

Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

Reply
 
Thread Tools Display Modes
 
Old 11-13-2007, 06:05 PM   #1
Registered Member
 
Join Date: Apr 2006
Posts: 13
Country: United States
Install a vacuum gauge for better mpg?

I saw a qoute on the web and had no way of verifying it, or knowing why it would help mpg?

START QUOTE Install a vacuum gauge and try to maintain the highest vacuum reading possible when driving. END QUOTE

What would this do for me (I Have an older 86 fuel injected Toyota MR2)
__________________

kozaz is offline   Reply With Quote
Old 11-13-2007, 06:25 PM   #2
Registered Member
 
ZugyNA's Avatar
 
Join Date: May 2006
Posts: 587
Country: United States
I put a multimeter on the O2 sensor to monitor cycling (closed loop) and also had a vac gauge hooked up. Found that with what I was testing that the engine was usually in closed loop when the vac reading was above 10 to 12 " hg. Some times needed to shift down a gear to maintain the 10-12" hg.

Either a vac gauge or an extra spring on the throttle setup to make the pedal stiffer when you push past the place where you hold it for cruise. Both remind you to lighten up.
__________________

__________________
Leading the perpetually ignorant and uninformed into the light of scientific knowledge. Did I really say that?

a new policy....I intend to ignore the nescient...a waste of time and energy.
ZugyNA is offline   Reply With Quote
Old 11-13-2007, 06:30 PM   #3
Supporting Member
 
cfg83's Avatar
 
Join Date: Sep 2006
Posts: 1,779
Country: United States
kozaz -

It's on my todo list to install. Try these threads :

Vacuum Guage and Digital Fuel Gauge - 02-05-2006
http://www.gassavers.org/showthread.php?t=477

What's my vacuum gauge telling me? - 05-08-2006
http://www.gassavers.org/showthread.php?t=878

Vacuum gauge instead of Scangauge? - 07-15-2007
http://www.gassavers.org/showthread.php?t=4356

For your 1986 MR2, a vacuum gauge would help. It also tells you things about your engine's health. I got the following from an el-cheapo Saturn manual on CD from ebay :

Attachment 1075
Attachment 1076

CarloSW2
Attached Thumbnails
Click image for larger version

Name:	vacuum_gauge_01.jpg
Views:	188
Size:	61.7 KB
ID:	917   Click image for larger version

Name:	vacuum_gauge_02.jpg
Views:	182
Size:	55.2 KB
ID:	918  
__________________
Old School SW2 EPA ... New School Civic EPA :

What's your EPA MPG? http://www.fueleconomy.gov/feg/calculatorSelectYear.jsp
cfg83 is offline   Reply With Quote
Old 11-13-2007, 06:31 PM   #4
Registered Member
 
DarbyWalters's Avatar
 
Join Date: Oct 2007
Posts: 376
Country: United States
Since vacumm occurs most when you are off the go pedal...keeping it in the "red zone" (vacumm) will mean that you are burning less fuel. It is kinda a guage of your throttle position...
__________________
2006 Jeep Liberty CRD...Founder of L.O.S.T.
OME 2.25" Lift w/ Toyo Open Country HTs 235/75/16s
ASFIR Alum Eng/Tranny/Transfercase/Fuel Skids
2002 Air Box Mod...Air Tabs (5) on Roof...(3)each behind rear windows
Partial Grill Block with Custom Air Scoop and 3" Open Catback Exhaust
Lambretta UNO150cc 4 Stroke Scooter



DarbyWalters is offline   Reply With Quote
Old 11-13-2007, 07:07 PM   #5
Registered Member
 
Join Date: Apr 2006
Posts: 13
Country: United States
Looks like I just found my scanguage alternative.

Thanks Guys for the info!
kozaz is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Publishing Fill-up Stats from Mobile Site? smknipe Fuelly Web Support and Community News 2 06-22-2011 06:27 AM
Where'd the graphs go?! Sonja Fuelly Web Support and Community News 3 02-10-2011 04:54 AM
epa estimates cseverens Fuelly Web Support and Community News 2 06-09-2010 04:48 AM
Missing Fuelup jmonty Fuelly Web Support and Community News 3 05-27-2009 05:10 AM
"active" aero grille slats on 06 civic concept MetroMPG General Fuel Topics 21 01-03-2006 01:02 PM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 12:16 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.