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Which O2 sensors do I use for the efie?
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RONG Offline
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Which O2 sensors do I use for the efie?
I have a 2004 GMC HD - it has four o2 sensors, to before the cats and 2 behind. Which ones do I use? Thanks, RONG
01-30-2009 08:32 AM
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mike Offline
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RE: Which O2 sensors do I use for the efie?
You must treat the upstream sensors. The downstream sensors are not used to calculate the air/fuel ratio.

The EFIE that you'll need is this one: Dual EFIE Deluxe.

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01-30-2009 09:00 AM
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RONG Offline
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RE: Which O2 sensors do I use for the efie?
(01-30-2009 09:00 AM)mike Wrote:  You must treat the upstream sensors. The downstream sensors are not used to calculate the air/fuel ratio.

The EFIE that you'll need is this one: Dual EFIE Deluxe.

I do have a dual EFIE, Thanks.
01-30-2009 09:06 AM
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Oriol Offline
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RE: Which O2 sensors do I use for the efie?
Hello guys, this is my first time here, I just finished my 36 plate dry cell and it work really good around 3 L/min at 13.5 volts 3o amps, but after I put HHO to the intake the "Service engine soon" Light turned ON, in the maintenance manual said that after 3 cycles (cool down complete then turn ON)the light should turn off, but that did not happen, last night I disconnect the battery to see if the computer reset ( I did not connected back yet) I am trying to get some feedback to find out which is the best way to go, the vehicle is a 2003 Ford Econoline 150 Cargo Van and I do not have EFIE devices yet
07-03-2009 11:07 AM
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colchiro Offline
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RE: Which O2 sensors do I use for the efie?
Hi Oriol.

It helps to know what the code is. Many auto parts stores will read codes for free, but I'd call first.

Where are you connecting your hho, to the engine intake or vacuum?

What size engine?

Rick

Links: Documents / Tuning for Mileage | Toyota Sensors | Autoshop Sensor Tutorials
07-03-2009 11:21 AM
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