O2 Experiment 06 Xa Scion - Page 3 - Fuelly Forums

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

Reply
 
Thread Tools Display Modes
 
Old 08-03-2007, 11:34 PM   #21
Registered Member
 
Join Date: Nov 2005
Posts: 331
Country: United States
Send a message via MSN to n0rt0npr0
You have to connect the EFIE to all upstream o2 sensors. Don't worry about the downstream sensor that is after the cat.

edit: Well after looking at my factory service manual, my chevy would need both sensors tapped into EFIE...

Quote:
Originally Posted by holypaulie View Post
How many oxygen sensors do you have? My car for exemple have two of them, so this mean I'd have to connect EFIE device to each one.
__________________

__________________
"You have to know the truth, and seek the truth, and the truth will set you free."
-unknown
n0rt0npr0 is offline   Reply With Quote
Old 08-04-2007, 05:06 AM   #22
Registered Member
 
Jim Dunlop's Avatar
 
Join Date: May 2007
Posts: 125
Country: United States
Does running lean introduce the risk of burning a hole in your cylinder wall due to higher temperatures and free oxygen, or is that just a myth?
__________________

__________________

Team: Right Lane Rollers
Jim Dunlop is offline   Reply With Quote
Old 08-04-2007, 05:23 AM   #23
Member
 
Join Date: Jun 2011
Posts: 49
Country: United States
Location: FL
Yes, it does, but not at the "lean" we're talking about. I'm guessing we're seeing somewhere around 15-16:1 with the EFIE, which isn't really all that dangerous. If we were to lean out to say, 20:1 then I'd definitely suggest water injection to prevent said burning of cylinders.
varg is offline   Reply With Quote
Old 08-05-2007, 12:26 PM   #24
Registered Member
 
holypaulie's Avatar
 
Join Date: Jan 2007
Posts: 108
Country: United States
Quote:
Originally Posted by cfg83 View Post
itjstagame -



I have the same EFIE, but I haven't installed it yet because I wanted to finish my digital A/F ratio gauge (a kit you solder). With the gauge I am able to "see" what the EFIE is doing in real A/F ratio numbers, not just flashing lights. Right now I am breaking the A/F gauge in and I can see a dominant 14.7 ratio over time. Once I attach the EFIE, I will shoot for a 15.5 ratio and see what happens.

So many projects, so little time ...

CarloSW2
cfg83 you have p.m. thanks in advance
holypaulie is offline   Reply With Quote
Old 09-07-2007, 09:40 AM   #25
Supporting Member
 
Join Date: Jun 2007
Posts: 10
Country: United States
Follow-up on my O2 EFIE install

Well I have been testing the EFIE on my Scion and have added a 5K resistor in parallel with the IAT sensor. this raised the IAT by about 8-10 deg F. A simple mod. I just pushed a T-pin through the two wires on the MAF wiring harness and inserted the resistor leads in the holes. A temporary installation to test for a ohm value I can live with.

So, with the EFIE set at 300 mv and the IAT at +10 F. here is how it looks.

Houston, TX Morning commute OAT 88 F for 38 miles.
All tires at max rated psi 45
Cruise ON for freeway
AC on
Speed for cruise = 60 mph
ave cruise mpg = 52
overall trip = 48.6
I forgot the ave speed number on the scangage I guess it around 38-40

These mods are conservative settings, yet are producing meaningful improvements in mpg.
Without these mods I could expect the freeway ave to be around 38-42.
I am reminded however... that the driving pattern, technique and other factors have a great deal to do with the final amount of gas consumed.
The greatest gains in fuel economy still come from me SLOWING DOWN and driving the speed limit.
Attached Thumbnails
Click image for larger version

Name:	Efie.jpg
Views:	88
Size:	41.4 KB
ID:	778  
Zerfstead is offline   Reply With Quote
Old 09-08-2007, 07:21 PM   #26
Registered Member
 
holypaulie's Avatar
 
Join Date: Jan 2007
Posts: 108
Country: United States
Quote:
Originally Posted by Zerfstead View Post
Well I have been testing the EFIE on my Scion and have added a 5K resistor in parallel with the IAT sensor. this raised the IAT by about 8-10 deg F. A simple mod. I just pushed a T-pin through the two wires on the MAF wiring harness and inserted the resistor leads in the holes. A temporary installation to test for a ohm value I can live with.

So, with the EFIE set at 300 mv and the IAT at +10 F. here is how it looks.

Houston, TX Morning commute OAT 88 F for 38 miles.
All tires at max rated psi 45
Cruise ON for freeway
AC on
Speed for cruise = 60 mph
ave cruise mpg = 52
overall trip = 48.6
I forgot the ave speed number on the scangage I guess it around 38-40

These mods are conservative settings, yet are producing meaningful improvements in mpg.
Without these mods I could expect the freeway ave to be around 38-42.
I am reminded however... that the driving pattern, technique and other factors have a great deal to do with the final amount of gas consumed.
The greatest gains in fuel economy still come from me SLOWING DOWN and driving the speed limit.
Zerfstead you have a PM
holypaulie is offline   Reply With Quote
Old 09-09-2007, 02:12 AM   #27
Supporting Member
 
cfg83's Avatar
 
Join Date: Sep 2006
Posts: 1,779
Country: United States
Zerfstead -

Quote:
Originally Posted by Zerfstead View Post
Well I have been testing the EFIE on my Scion and have added a 5K resistor in parallel with the IAT sensor. this raised the IAT by about 8-10 deg F. A simple mod. I just pushed a T-pin through the two wires on the MAF wiring harness and inserted the resistor leads in the holes. A temporary installation to test for a ohm value I can live with.
There is the possibility that the IAT resistor mod is fooling the ScanGauge, at least for some drive-trains :

Batman we have lean burn! 49.6 mpg!
http://www.gassavers.org/showthread.php?t=2160

Quote:

So, with the EFIE set at 300 mv and the IAT at +10 F. here is how it looks.

Houston, TX Morning commute OAT 88 F for 38 miles.
All tires at max rated psi 45
Cruise ON for freeway
AC on
Speed for cruise = 60 mph
ave cruise mpg = 52
overall trip = 48.6
I forgot the ave speed number on the scangage I guess it around 38-40

These mods are conservative settings, yet are producing meaningful improvements in mpg.
I agree with being conservative, better (engine) safe than sorry. I know the EFIE is working because I can see the AF ratio go lean and feel the engine lose power, but the ScanGuage may not be recording the effect :

Just ordered an EFIE - BrightGreen FeverBuster
http://www.gassavers.org/showpost.ph...87&postcount=5

Quote:

Without these mods I could expect the freeway ave to be around 38-42.
I am reminded however... that the driving pattern, technique and other factors have a great deal to do with the final amount of gas consumed.
The greatest gains in fuel economy still come from me SLOWING DOWN and driving the speed limit.
My Theory : You're IAT resistor mod is not working, but the ScanGauge is reacting to it and improving your displayed MPG. You're EFIE is working, but the ScanGauge is not recording it's effect. Result? The ScanGauge is wrong but you are still getting better MPG.

This message has been brought to you by the Better Confusion Bureau, .

CarloSW2
__________________
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 09-09-2007, 11:52 AM   #28
Registered Member
 
Join Date: Aug 2007
Posts: 49
Country: United States
overtime this is gonna cost you allot more then your saving in fuel.
bfg9000d is offline   Reply With Quote
Old 12-11-2008, 09:34 AM   #29
Registered Member
 
Join Date: Dec 2008
Posts: 1
Country: United States
bfg9000d

Hi sir. I for one would like to see documention concerning your listing. I'm anticipating some mods to my XB and would like to know if I'm slipping into deep water! Please advise, Ron.
__________________

whtxb 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
Odometer help/suggestion waterboysh Fuelly Web Support and Community News 10 12-14-2012 04:38 PM
Site navigation refinement 740dan Fuelly Web Support and Community News 3 04-26-2011 04:00 AM
Conversion successful Matt Timion Fuelly Web Support and Community News 12 05-18-2006 03:24 PM
Electric panel heaters GasSavers_JustMe General Discussion (Off-Topic) 0 01-03-2006 04:43 PM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 10:40 AM.


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