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Discussion Starter #1
I have all 4 o2 sensors go out wood it be better 2 just get new o2 sensors or just get the o2 deleter and do that?
 

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It would be quite unusual that all four O² sensors would fail at the same time, what makes you feel they have? Trouble codes, if so what are the codes?
 

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I'm pretty sure you need at least two for the ECU to operate your engine correctly.
Yes, the two front sensors are used for engine control--directly in closed-loop mode and indirectly in open-loop mode, as the long term fuel trims are learned from the short-term trims.

The rear sensors are only used to monitor the catalytic converters...
 

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Discussion Starter #7
We'll I put it on my computer and it sead all 4 was out and it won't go past that till I fix it and idk wich is better the elemater or new senser I have a 2 cat H pipe whit flow master
 

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We'll I put it on my computer and it sead all 4 was out and it won't go past that till I fix it and idk wich is better the elemater or new senser I have a 2 cat H pipe whit flow master
What were the trouble codes?
 

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Mine don't tell cods it tels me what it is lol it was about 5000 for it
Oh. I have never heard of a scan tool (at any cost) that did not read the OBD2 codes.

What make and model is it--sounds like an interesting instrument. I'd like to know more about how it determines ECU engine control problems without reading the DTCs?

Does it tell you what about the O² sensors is bad? The heater or sensor circuits, and what the problem might be--like lack of or slow switching, output stuck lean or rich, too much or too little heater current draw, etc. The OBD2 codes can report all of these and more...
 

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New me said:
I have all 4 o2 sensors go out wood it be better 2 just get new o2 sensors or just get the o2 deleter and do that?
All 4 o2 sensors went out? Are you sure? How did you test this?
 

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Discussion Starter #12
I got it throw snap on idk much about it other then it will hook 2 any make and motel car truck and I ask summit and thay sead that when the upper o2 gos our the lower nor fare behind but both top r out and I just need 2 know what is better new sender or deletes
 

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If indeed all four O² sensors are bad then you need four new sensors, even if you wish to use MIL Eliminators.

The eliminators work by modifying the signal from installed and working rear sensors so as to trick the PCM into believing the catalytic converters are there and working--more about how you can make your own for $5 or $6, and how they work here.

There used to be a number of O² sensor simulators available, that do not require a rear sensor, however the modern EFI systems are not as easily fooled by a steady simulated signal--they expect to follow the front sensor signal to some degree.

Here is one such circuit I created for a friend's Camaro (1994 IIRC).

 

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New me said:
I asking wich is better new o2 or deletes
Don't do deletes. O2 sensors measure oxygen and adjust your air fuel ratio based on how much o2 comes out. It fluctuates from rich to lean. You can run a car without o2 sensors, many people do, but its not just that simple. IMO for a reliable DD the o2 sensors are a must.
 

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Dub9stang said:
Don't do deletes. O2 sensors measure oxygen and adjust your air fuel ratio based on how much o2 comes out. It fluctuates from rich to lean. You can run a car without o2 sensors, many people do, but its not just that simple. IMO for a reliable DD the o2 sensors are a must.
+1 they are a must. I understand what he means by knowing when o2 sensors are bad because you will notice poor performance great amount of fuel consumption idle surge etc. of course you all know your car with overtime driving it. That's how we notice all these lite things about them. With that being said you can use rear deletes or mil. But you still have to replace and use o2 sensors. Your car will cost more to run with out them then it would just to replace them. Do the math @ $3.29 a gall and with out o2's your filling up every three to four day with fuel consumption. To where if you just spend $100 and replace them it would be more cost effective that way...

---------- Post added at 01:33 PM ---------- Previous post was at 01:28 PM ----------

AM sell front and rear for $50 a piece. Buy front two replaced them then mill out back two till you get enough to replace back two. Front two are a must to replace right now because gas is eating you right now I know it is because its same deal with me...
 

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As others have said, the front sensors are essential to engine control, however the rear sensors have nothing to do with operating the engine--all they do is monitor the catalytic converters, MIL Eliminators are fine back there.
 

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cliffyk said:
As others have said, the front sensors are essential to engine control, however the rear sensors have nothing to do with operating the engine--all they do is monitor the catalytic converters, MIL Eliminators are fine back there.
Agreed so just do as we tell you "New Me" lol joking...
 

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To clarify a bit;

For MIL Eliminators to work requires that the rear O² sensors be installed and fully functional.

I get dozens of emails a year from people that have viewed my DIY MIL Eliminator page (the most popular page on my site at 10,000 visitors/year) and yet don't seem to get that.
 
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