how bad would it be if i did not run a 02 sensor in my obd0 car?


thanks
richie

 

youll just be running rich, waste of gas ya know.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRX_Control &raquo;</TD></TR><TR><TD CLASS="quote">youll just be running rich, waste of gas ya know.</TD></TR></TABLE>

Huge waste...I had no o2 in my 90 si for awhile and it got mid 20's mpg....

Installed a sensor, and it got mid 30's after

 

no performance lost

 

Yes performance loss, your ECU is no longer running on external set maps, but in "safe" mood you can say by making everything as conservatively trimmed as possible to stop any more codes from popping up and to allow you to make it to a place of service without any more damage occuring, or at least that is the plan.

 

youll be runnin in open loop mode, meaning your pcm wont know wtf is going on so it will have to rely on map sensor, and your cts to meter your fuel which may or may not effect your gas mileage depending on ambient temp. but really the only BAD thing is you cat may get filled with unburnt fuel (cause your running rich)that is if you have a cat, but really its just gonna turn your mil light on. so its really wond do a thing except run kinda crappy.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 350SSi &raquo;</TD></TR><TR><TD CLASS="quote">youll be runnin in open loop mode, meaning your pcm wont know wtf is going on so it will have to rely on map sensor, and your cts to meter your fuel which may or may not effect your gas mileage depending on ambient temp. but really the only BAD thing is you cat may get filled with unburnt fuel (cause your running rich)that is if you have a cat, but really its just gonna turn your mil light on. so its really wond do a thing except run kinda crappy.</TD></TR></TABLE>

Um, some of that makes sense, but the rest...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dr_latino999 &raquo;</TD></TR><TR><TD CLASS="quote">in "safe" mood you can say</TD></TR></TABLE>

I'm glad someone else calls it safe mode and not limp mode. Limp mode is very different, and you would hate life if your car ever entered it. The only time I've seen it happen is when you **** with the computer. 3k rev limit, unbelievably rich, horrible stumble. It runs, but you almost wish it didn't.

 

what dosent make sense?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by drdisco69 &raquo;</TD></TR><TR><TD CLASS="quote">

I'm glad someone else calls it safe mode and not limp mode. Limp mode is very different, and you would hate life if your car ever entered it. The only time I've seen it happen is when you **** with the computer. 3k rev limit, unbelievably rich, horrible stumble. It runs, but you almost wish it didn't.</TD></TR></TABLE>

limp mode sucks...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 350SSi &raquo;</TD></TR><TR><TD CLASS="quote">youll be runnin in open loop mode, meaning your pcm wont know wtf is going on so it will have to rely on map sensor, and your cts to meter your fuel which may or may not effect your gas mileage depending on ambient temp. but really the only BAD thing is you cat may get filled with unburnt fuel (cause your running rich)that is if you have a cat, but really its just gonna turn your mil light on. so its really wond do a thing except run kinda crappy.</TD></TR></TABLE>

1) CTS to meter your fuel?
2) Cat getting filled with unburnt fuel? It isn't like he is running 1000cc Injectors
3) Mil light?

 

CTS is a coolant temp sensor, and mil is a Malfunction Indicator light, if the car is not fully in Limp or safe mode, it will still monitor the remainig sensors to determine how to meter the fuel, if the cars sees it is cold, it will it will run rich until the cross count of the o2 read a steady lean-rich signal, or voltage varying from the amonts of oxygen in the exhaust, if the o2 is busted it will not know when to stop increasing the injector pulse. Also if the o2 is busted it may cause a situation where it cannot meter the nox emmisions(combustion temp too high) where the egr would normally cool down the combustion temp, which may cause carbon deposits forming on the top of the piston, causing detonation combined with the increased compression resulting due to the space that said deposits would take up, and his engine just might explode and kill you for being a jerk!

 

And do you know how long it would take for all you said to build up to unsafe levels? Drove for 35,000 miles on a D15B2 with quasi working O2 sensor, burning oil like gas, and when I took it apart the carbon buildup was no where to an "Unsafe level."

 

why NOT run one.. $30 spent on the o2 sensor will pay itself off fairly quick on gas.

 

I am running no O2 in my CRX due to problems with one or two connected.

Open loop for me works and gas milage on the highway is 36mpg and city is 22-24mpg so it's normal.

Just remember if you don't hook them up right then your car will run like ****.

Here is a little bit of info to read up on.

https://honda-tech.com/zerothread?id=1003080

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crx_88_si &raquo;</TD></TR><TR><TD CLASS="quote">why NOT run one.. $30 spent on the o2 sensor will pay itself off fairly quick on gas.</TD></TR></TABLE>

makes a hell of a lot of since to me

 

What if you have a chipped ecu then how does that effect the 02 sensor.

 

You still need it unless your ECU program has been written to not register the O2 sensor. I do know that in Uberdata you can remove the heated O2, but it assumes you will replace it with a standard one-wire/wide-band. Correct me if I am wrong anyone.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dr_latino999 &raquo;</TD></TR><TR><TD CLASS="quote">You still need it unless your ECU program has been written to not register the O2 sensor. I do know that in Uberdata you can remove the heated O2, but it assumes you will replace it with a standard one-wire/wide-band. Correct me if I am wrong anyone.</TD></TR></TABLE>

I don't know what to search for to give you a good answer but on an OBD1 car you cannot remove the O2 and expect it to run properly.

I have yet to read where you can use a One-wire O2 to replace the standard 4-wire O2.

Someone more experience please answer this, I just know that this is not done.

 

the worst thing that could happen, your motor runs too rich too long and wash down the cyl. walls, ruining the rings and walls.
at the least your ruining your cat the longer you run without o2 sensor.

 

Your car will running open loop mode with 1 of the 2 O2 sensors hooked up which means it is ignoring input from the o2 sensors and running on hard coded tables already on the ECU. While this is not bad for your motor, your gas mileage will suffer a little.

Closed loop is what is it supposed to be doing if both 02's were hooked up properly and you were not flooring it, meaning the ECU is constantly monitoring your A/F ratio by getting info from the 02 sensos and making constant changes to achieve an optimal A/F of 14.7 for the best possible gas mileage.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by esponet &raquo;</TD></TR><TR><TD CLASS="quote">the worst thing that could happen, your motor runs too rich too long and wash down the cyl. walls, ruining the rings and walls.
at the least your ruining your cat the longer you run without o2 sensor.</TD></TR></TABLE>

If this post was towards me then my reply would be that the car was dyno tuned with the VAFC hack and A/F was pretty damn good and held the 12 mark to 7k then 11.5 from 7k to 8k.

 

it was meant for the original poster's question

 

Richie,

Why don't you want to run an O2? I can help you w/ any prolems you may have(you know that). What we should do is convert it to obd1(Uberdata owns you) but, I have a 1 wire here at the house if you need it .

Phil

 

limp mode = cant rev past 3k - i was there it sucked
safe mode = cant rev past 5k - ive been there last week to it sucked
loop mode = no oxygen sensor car runs rich but car still runs ok not best - this is where i am right now. The car gas mileage sucks. But im waiting on a oxygen sensor so you know **** happens.

DEF