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EFIE CALIBRATION
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Zipstor Offline
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Post: #1
EFIE CALIBRATION
This old (2007) video by ZFF shows you a quiet effective way to figure out what offset can work best for you. They are basically measuring the average value (mV) on one O2 sensor with no HHO input. Then turn the cell on. The meter then drops to a lower average value (it can be tricky because the values are constantly changing) in correlation with the amount of gas going in.

So value1 minus value2 equals your offset for the given amount of gas. Voila!

http://www.youtube.com/watch?v=pEC-swbpSpw

>> http://brownsgas.com
(This post was last modified: 02-18-2009 03:06 AM by Zipstor.)
02-17-2009 06:39 PM
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mike Offline
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Post: #2
RE: EFIE CALIBRATION
Hmmm. Not bad. As you say, it'll be tricky to read an average value when the changes are so quick. The other problem is that the ECU will start compensating almost immediately to richen the air/fuel mix, which will skew the results of the reading.

But anything that can help simplify the process of properly setting the EFIE is helpful.

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02-18-2009 11:47 AM
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Zipstor Offline
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Post: #3
RE: EFIE CALIBRATION
I guess that previously the sensor has to be disconnected from the ECU... So the reading would be only from the sensor itself and therefore the ECU would not receive any signal at this stage...

Stupid question: If the ECU compensates by itself, why would I need an EFIE in the first place? :s

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02-18-2009 02:46 PM
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colchiro Offline
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Post: #4
RE: EFIE CALIBRATION
Generally, in the presence of hho, it likes to make the mixture richer, instead of leaner, like you'd think.

Rick

Links: Documents / Tuning for Mileage | Toyota Sensors | Autoshop Sensor Tutorials
02-18-2009 03:08 PM
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Zipstor Offline
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Post: #5
RE: EFIE CALIBRATION
Well yeah.. if the numbers are going down on sensor side I gathered that it makes the mixture richer. That's why the EFIE is getting the numbers up, to lean it up.. You tought me that Rick.. so i know already.. Smile

BTW I went for an emission test today and it showed that my car is running only 10% richer (EFIE OFF), and only at idle... no difference at cruising speed. That's cheap I reckon.. Don't you..

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(This post was last modified: 02-18-2009 10:30 PM by Zipstor.)
02-18-2009 10:26 PM
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colchiro Offline
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Post: #6
RE: EFIE CALIBRATION
Is that 10% richer with hho on?

Rick

Links: Documents / Tuning for Mileage | Toyota Sensors | Autoshop Sensor Tutorials
02-19-2009 02:06 PM
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Zipstor Offline
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Post: #7
RE: EFIE CALIBRATION
Something like that. I reckon I'd need 3LPM at least don't you think..

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02-19-2009 05:37 PM
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colchiro Offline
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Post: #8
RE: EFIE CALIBRATION
Zipstore Wrote:.8LPM on 3.8 v6

If it was my vehicle, I'd be shooting for about 3 LPM.

Mike is a bit more conservative and would say you could do it with less.Wink

OTOH, if your current setup is maxed out and you need a new cell, you'd want some wiggle room.

Rick

Links: Documents / Tuning for Mileage | Toyota Sensors | Autoshop Sensor Tutorials
02-19-2009 06:07 PM
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Zipstor Offline
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Post: #9
RE: EFIE CALIBRATION
Definately..

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02-19-2009 06:40 PM
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