Tech Question
 

Not sure where to ask this but here goes:

In OpenLoop, what is an ideal o2 volt for a boost Honda?

A).90v
B) .92v
C) .94v
D) .96v
E) .98v

Granted (miles may vary) due to o2 sensor age and accuracy issues. What should be the ideal volt during WOT or OpenLoop?

Re: Tech Question (immortaly2k)
 

ttt

Re: Tech Question (immortaly2k)
 

on a N/A car it should be running between .4 and .6 volts

Re: Tech Question (Crazydave)
 

What?

.40v / .60v ? I think that is like MELT DOWN lean.. ???

Re: Tech Question (immortaly2k)
 

O2 sensor normal range is between .1 and .9 volts. When the vehicle is in closed loop, it fluctuates between .3,.4 to .7,.8. The only real accurate way to watch it is with a digital storage oscilliscope. Lower voltage = leaner, higher voltage = richer.

Re: Tech Question (b19coupe)
 

It's actually the opposite.... Lower the richer it is.. the higher it is the leaner it is... Heat creates voltage... A lean motor burns hotter.. Latez

Re: Tech Question (JDMspecEG6)
 

Beg to differ. Add propane to an engine and watch the O2 sensor voltage readings. Propane richens the mixture. The relationship between rich/lean mixtures and high/low O2 sensor voltages is something I have to know in order to pass the ASE L1 and California Smog Check Technician tests.

Re: Tech Question (b19coupe)
 

connect a voltmeter to an oxygen sensors signal line... Ground the voltmeter then heat the oxygen sensor with an acetylene torch from about 6 inches back.. Watch the voltmeters voltage rise as you heat the O2.... http://rely.net/~htimages/smile/emsmile.gif


[Modified by JDMspecEG6, 10:56 PM 11/28/2002]

Re: Tech Question (JDMspecEG6)
 

So are we talking about a heat sensor, or an O2 sensor? I think that we have reached an impasse. Neither one of us is going to convince the other. I will get my reference material that I have at work and try to present a more convincing argument. Take it easy.

Re: Tech Question (b19coupe)
 

I wasn't talking about a heated O2, were you??? I haven't tested a 4 pin heated oxygen sensor yet... But i'm sure you are right about them...


[Modified by JDMspecEG6, 11:13 PM 11/28/2002]

Re: Tech Question (JDMspecEG6)
 

Well, back to Q at hand.

Since we have very knowledgable people looking at this thread, let me ask a more general question:

When dyno tuning a "'Honda" **Specifically, New 1999+ ** Not a 1995 Civic with a very accurate (WIDE BAND Equivalent O2 sensor). What is the "NORM or AVERAGE" O2 reading that a warmed up stock O2 sensor reads at WOT / OpenLoop?

This question especially applies to dyno shop owners and/or folks that have seen many dyno tunings in the past on Hondas.

I personally have seen many DSM's dynoed and have a good bit of Mitsu knowledge in this area but very limited with Honda.

Thanks for the help and quality information guys and Happy Thanksgiving, everyone!

Tech Question
 

i currently have a dx 1.5 and had the sparkplug 1 come loose and strip the last few threads on the manifold. i got it fixed but now when hitting the high RPM's it sputters like its running out of gas. i have to back off, and chill on the gas pedal, and cruise. the plugs are all new and plug wires, and all the distributer parts and housing are new as well. what could be going on?

Re: Tech Question (immortaly2k)
 

Jeff at Import Builders should be able to answer that one because he dynos with a wideband O2 sensor when tuning Hondata.

As for the discussion above about how O2 sensors operate here is an excerpt from a Honda publication:
"The heart of a typical O2S is a thimble-shaped element made of a special material called zirconium dioxide (ZrO2). The inner and outer surfaces of this element each have an electrode made of a layer of thin porous platinum. The O2S is designed so that the inner surface of this element is exposed to ambient air (the atmosphere), while the outer surface, which also has a porous ceramic coating, is exposed to the exhaust gasses.
While some oxygen is still present in burned exhaust gasses, there's obviously more oxygen present in the atmosphere. Because the oxygen proportions differ between the inner and outer surfaces of the element, and thanks to the special properties of the ZrO2, a voltage is generated between the two electrodes.
Keeping in mind that the amount of oxygen in the atmosphere is relatively constant, the voltage output will vary as the amount of oxygen in the exhaust gasses varies. Less voltage is generated when the air/fuel mixture is lean because of the higher oxygen content in the exhaust. More voltage is generated when the air/fuel mixture is rich because of the lower oxygen content in the exhaust. By monitoring this voltage, the ECM knows how rich or lean the air/fuel mixture is, and it adjusts the mixture accordingly."
Lesson over.

Re: Tech Question (b19coupe)
 

Would love to get some input from Jeff or any other Honda dyno tuner.

Thanks b19coupe..

Re: Tech Question
 

i currently have a dx 1.5 and had the sparkplug 1 come loose and strip the last few threads on the manifold. i got it fixed but now when hitting the high RPM's it sputters like its running out of gas. i have to back off, and chill on the gas pedal, and cruise. the plugs are all new and plug wires, and all the distributer parts and housing are new as well. what could be going on?

Re: Tech Question (immortaly2k)
 

Try to I.M. Jeff, he's ImportReview on this board.