is there any drawbacks to this? im running an open downpipe with no o2 sensor, im not getting a cel or anything, so im wondering should i go get a bung welded in or just not run one at all?

 

please run an o2 sensor.

edit, obd1 or 2? you should run at one either way, but ive heard of simulators for the secondary o2 on obd2's....

 

it was an obd2 car but now its converted to obd1.

[QUOTE=f22b2tdave]please run an o2 sensor.
QUOTE]

why? i made this post for info on drawbacks of not running it, im going to run one, just wondering the drawbacks

 

Only drawback is shittier gas mileage.
If you spend enough time tuning the vacuum portion of your maps though, you can
do without it.

 

i dont have one with my hondata

 

ive seen people go without. Like sid above, i think if its tuned enuff it can be done.

 

you wont need it if Mase tuned it...when we disconnected mine i was like WTF?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rioninja &raquo;</TD></TR><TR><TD CLASS="quote">Only drawback is shittier gas mileage.
If you spend enough time tuning the vacuum portion of your maps though, you can
do without it. </TD></TR></TABLE>

how much wose on gas milage?

 

i run my pw0 turbo also in open loop... i have tuned my vacuum map parts very carefully and have a better gas milage then with closed loop and i have a far far better response from vacuum to atmosphere to boost.... very smooth power...

i will never switch CL on again on this car ;-)

 

programmed mine to shut off above idle speed, i just monitor it, it was programmed with the o2 though, so it duplicates those running conditions

 

run one it could save your engine if something goes wrong. you also have nothing to compensate for dirty fuel injectors and such

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16h22a &raquo;</TD></TR><TR><TD CLASS="quote">run one it could save your engine if something goes wrong. you also have nothing to compensate for dirty fuel injectors and such</TD></TR></TABLE>

If your injectors get dirty or something else goes down in the system the o2 sensor isn't going to save anything. You will run lean once it switches to open loop whether you are running with closed loop or not. It can also still bounce lean even with closed loop enabled if it's that far off target. I've been running in open loop for a while now and will never go back

 

umm ya you are completely wrong, The oxygen sensor reports live information about the engine's air/fuel mixture to the computer. This information is used primarily to help calculate fuel delivery to the engine, which changes continuously while it is running. If the engine is running lean, the powertrain control module will sense this from the oxygen sensor's signal and increase the air/fuel mixture to the engine same goes the oppisate way. say you have a clogged fuel filter and you are running no oxygen sensor. you have nothing to tell you that you are running dangerously lean and risk damaging your engine

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16h22a &raquo;</TD></TR><TR><TD CLASS="quote">umm ya you are completely wrong, The oxygen sensor reports live information about the engine's air/fuel mixture to the computer. This information is used primarily to help calculate fuel delivery to the engine, which changes continuously while it is running. If the engine is running lean, the powertrain control module will sense this from the oxygen sensor's signal and increase the air/fuel mixture to the engine same goes the oppisate way. say you have a clogged fuel filter and you are running no oxygen sensor. you have nothing to tell you that you are running dangerously lean and risk damaging your engine</TD></TR></TABLE>

pls dont start a reply flat with flat out your wrong. we are no longer talking about cars with a fart can and dryer vent intakes, highly modified vehicles require more attention and maintenance then stock, i have balanced injectors, i have an 1micron fuel filter etc...my car wont get damaged from a dirty injector. say your o2 sensor is spent it will report incorrect to your pcm, yada yada yada

 

if it is spent it will effect performance to a degree but when it gets really bad the pcm realizes this and will go into limp mode (to protect the engine) if a code is thrown.

say you have a rather large vaccum leak you have nothing to compensate for that either. at the end of the day it is better to run with an o2 sensor than without one. and with a proper tune in the computer an o2 sensor can only help

 

if you have a wideband you should be ok right?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16h22a &raquo;</TD></TR><TR><TD CLASS="quote">if it is spent it will effect performance to a degree but when it gets really bad the pcm realizes this and will go into limp mode (to protect the engine) if a code is thrown.

say you have a rather large vaccum leak you have nothing to compensate for that either. at the end of the day it is better to run with an o2 sensor than without one. and with a proper tune in the computer an o2 sensor can only help</TD></TR></TABLE>

pls for the sake of keeping this short i have only tried to answer the original thread, yes 90% of all applications require an 02, this thread asks for the other side!
my car is based off load rather than o2 as i have programmed fuel to a known load and locked it, got it!!!!! if i have a vac leak, i will not register load, and therfore fuel will be compensated for. now stop throwing in all this say what if crap, install your crap right the first time. say what if you advance your exhaust cam gear so much that the car reads richer because the air fuel is simply being sucked out the open valve and read by the 02??? yr gonna read rich right????? go figure that one and bother me later.

 

yes he asked if there are any drawbacks i really don't care what your car has

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MrBui &raquo;</TD></TR><TR><TD CLASS="quote">i dont have one with my hondata </TD></TR></TABLE>
ME TOO!! Drawback...hmmm...none that I am aware of.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16h22a &raquo;</TD></TR><TR><TD CLASS="quote">yes he asked if there are any drawbacks i really don't care what your car has</TD></TR></TABLE>

What you fail to realise, is that the majority of ecus only use narrowband oxygen sensor feedback during idle and part throttle conditions. If your over a certain throttle position or load condition (ie: get on it y0), the computer doesnt care whether your o2 sensor is in your downpipe, or sitting in the seat next to you holding on for dear life.

 

yes but you do most of your driving at part throttle wide open throttle is calibrated rich enough where running a little lean won't hurt anything

 

your annoying, do you like playing symantics all day or does this kid get his questoned answered, people like you make it difficult to exchange ideas on this forum.
I tried answering your stupid "say what if" problems with concrete practical answers from experience, no theories or what ifs....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16h22a &raquo;</TD></TR><TR><TD CLASS="quote">yes but you do most of your driving at part throttle wide open throttle is calibrated rich enough where running a little lean won't hurt anything</TD></TR></TABLE>
just stop talking if you don't know **** about the situation. On a boosted car do you think its a good idea to have a stock o2 sensor trying to get your afr to 14.7:1 when you are boosting at partial throttle. Would the o2 be saving your motor then?

Ever since I've disabled my o2 sensor and tuned my partial throttle maps my car has been running great at part throttle with a much better vac to boost transition.

 

the o2 sensor does not tell the computer to run at 14.7 to one the computer itself has that as the ratio programmed into it that it aims for and the o2 sensor helps make corrections to achive whatever ratio is programed into the computer.

have a nice day you stupid ****.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16h22a &raquo;</TD></TR><TR><TD CLASS="quote">the o2 sensor does not tell the computer to run at 14.7 to one the computer itself has that as the ratio programmed into it that it aims for and the o2 sensor helps make corrections to achive whatever ratio is programed into the computer.

have a nice day you stupid ****.</TD></TR></TABLE>
what is your point? Since the ecu is programed to look for 14.7:1 while in closed loop and the o2 sensor helps it achieve 14.7:1 then that is whats gonna happen. Either way you will still be leaning out dumbass