Civic VX Lean Burn monitor - Page 4 - Fuelly Forums
Thread Tools Display Modes
Old 12-11-2012, 06:38 AM   #31
Junior Member
Join Date: May 2011
Posts: 6
Country: United States
I have 2 VXs for 2 years now and love them. Would like to get a LED indicator that shows when in lean-burn mode if possible. Does anyone make one or have instructions to solder something together to indicate to the driver that engine is operating in lean burn mode? Even if I can splice a wire that is open/closed circuit I can install a relay and a light to turn on when its state goes hi/low?

Thanks for any help or experience doing this already.

mrbisset is offline   Reply With Quote
Old 12-11-2012, 05:22 PM   #32
Registered Member
Join Date: Mar 2012
Posts: 200
Country: United States
Do a search you need tap into the vtec solenoid. someone has done it either on here or on ecomodder. I think it might have been lean burn enthouiest saying he did it.

Rusty94cx is offline   Reply With Quote
Old 01-10-2013, 09:07 AM   #33
Registered Member
Join Date: Sep 2012
Posts: 5
Country: United States
so far, no results

Tried your pins suggested here, d14/d16 and I git some voltage sometimes when the car is cold, but right away it drops to near zero. Fluctuating in the .005 to .0005 kind of range. One of those pins to chasis ground gives me the 2.7 always (reference v?).

This is on my old O2 sensor (says L2H2 on it) and on a new one from

Those pins were not the colors you described, and I have not had time yet to go back in and test any possibilities. Just wondering if you have any suggestions first?

my /problem/ is I get a stumbling hesitation at low throttle levels when I'm trying to maintain a gentile cruising speed. If I unplug the O2 sensor this goes away. Replacing the o2 sensor did nothing. Any suggestions what else would cause this? I also do not notice lean burn kicking in on the mpgUino display.

Thanks for any advice!!!

Originally Posted by TomO View Post
It looks like it would work as a monitor.

There are two ways of monitoring the LAF:
Positive lead of the DMM/DVM to pin D14 (orange with blue stripe)
Negative lead to pin D16 (blue with green stripe wire)
for a reading of -1.xVolts to +.XVolts. + being in lean burn mode.


Positive lead to D14
Negative lead to chassis ground or D22 (sensor ground)
for a reading from +0.xV to +3.1V (lean burn is when readings are above 2.7V)
GasSavers_porkchop is offline   Reply With Quote
Old 02-27-2013, 02:31 PM   #34
Registered Member
Join Date: Feb 2013
Posts: 2
Country: United States
i have this same problem with my lean burn and from talking to a shop today a guy had his vx in thier for the same problem, they said every time it stumbled is when lean burn was kicking in, confrimed from a wideband they had hooked up while testing it the afr's would be very high on low rpm throttle tip etc.. the same thing i complained to them my car was doing to, so from what it sounds like then that this is the norm for any lean burn motor

construct1 is offline   Reply With Quote

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
Number Section of iOs keyboard boostventilator Fuelly Web Support and Community News 5 09-23-2012 09:23 AM
Mobile Page for Smartphones GTGallop Fuelly Web Support and Community News 1 02-23-2011 10:34 AM
A Couple of Possible Additions mechjames Fuelly Web Support and Community News 3 02-13-2010 10:16 AM
126 mpg! Draigflag General Fuel Topics 4 08-20-2009 09:10 PM
Need way to indicate a missed fuel-up entry exists silente Fuelly Web Support and Community News 7 08-20-2008 07:46 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -8. The time now is 10:16 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.