First of all, my car was having fuel pump problems... It was parked for nearly 3 months, sitting there in my yard killing grass. So I decided to see what was up one day. I had hooked up a wire from my Alpine SEC-150R alarm to the wrong place. So anyway, yanked the wire and it ran fine. Ok, that was completely irrelevant, other than the fact that I can't remember the O2 status after not driving it for 3 months.
My main question is: As far as I can remember, both stock O2 sensors are bad on my car. I am buying parts for my turbo setup daily. Can I go ahead and get a wide-band O2? And in which position does the wide-band O2 go? Bank 1 (pre-cat) or bank 2 (post-cat)?
Another question: What exactly does the wide-band O2 do over a stock one? Read a/f mixture more accurately? Adjustable? If so, what is adjustable?
I'm trying to save money by *not* buying stock replacement O2 sensors to 'get me by' until I install my turbo setup. I'd rather just upgrade now if possible.
I'm running crappy times at the track. We only have a 1/8 mile track nearby and I run 11's there. I believe I should be running mid-to-low 10's stock. Something's *really* wrong. I read something on here about my computer going into 'limp' mode, is that what's happening with both O2 sensors being bad?
the wideband goes as your pre-catalyst sensor, meaning the one that goes into the exhaust manifold. as the tuning aspect goes, a good wideband (such as the LM-1) lets you tune for a specific AFR at specific RPM levels.
I was a retard, and now I'm permanently banned.
You need your stock 02 regardless, that tells the engine how much fuel it needs and comunicates to the ECM etc; Now if you wanna add a wideband to it just run the sensor from the wideband a little downstreem from your stock one in the exhaust pipe. What the wideband will tell you is basicly how much fuel your car is getting in real time, from your exhaust.
Keeping your stock 02 or replacing it becuase its bad is a must, so yourll basicly have two, 02 sensors. One for the cars eletronic needs to run efficeintly, and the one to read exhaust for your wideband.
So technically I would have three O2 sensors total? One pre-cat, a wideband, and the post-cat sensor? Or does the wideband replace the pre-cat O2 in the header or downpipe?
Is a wideband O2 even necessary if I have some kind of fuel management like e-Manage of SAFC, or do they do completely different things altogether? I'm not a complete newb when it comes to turbo, but it's things like this that I'm trying to pull together before I do something wrong and blow my engine.
And what's the difference between the A/F gauge that I already ordered (damn me) that hooks up to the stock O2 and readings from a wideband with the LM-1, etc.? Just tuning capabilities? Once again, will a fuel management system let me do this?
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So technically I would have three O2 sensors total?
Thats correct, unless you get a 02 simulator for the one after the cat, but that is mainly for people who run cat-less.
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Is a wideband O2 even necessary if I have some kind of fuel management like e-Manage of SAFC, or do they do completely different things altogether?
It is if you are tuning your car yourself. You make the adjustments on your e-manage or FMU or SAFC, then do a run and watch your wideband to see if you leaning out or running to rich to where you need to add or take away fuel. It is a great unit to have when tuning period.
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And what's the difference between the A/F gauge that I already ordered (damn me) that hooks up to the stock O2 and readings from a wideband with the LM-1, etc.?
Well a normal A/F guage is pretty narrow and pointless, very unaccurate. It will read lean to rich and it use's the stock 02 sensor that is very narrow.
for example:
normal A/F guage reading...
* * * * *
lean stoich rich
Wideband A/F guage reading...
****** * * ******** ******* ******** ******* ******* ***** ******* ******* ******* *******
lean stoich rich
- where each " * " represents where your gauge could read to you....which one do you think is more accurate?? hehe best way i could explain it to you.
let me try that again.
Example:
normal 02 a/f guage:
* - * - * - * - *
Lean -stoich-rich
Wideband a/f guage:
*********-***********-**************-************-************
Lean-----------------------stoich-------------------------------rich
m0 wrote:So technically I would have three O2 sensors total? One pre-cat, a wideband, and the post-cat sensor? Or does the wideband replace the pre-cat O2 in the header or downpipe?
Actually, some of the wideband devices out there replace a stock O2 sensor. Thats what I did, and it is a lot easier, because you don't have to weld in another bung into your exhaust pipe to accept another sensor. The wideband would go in the pre-cat position, and the wideband box will have a narrowband output wire, you just splice that into the wire that your normal front O2 sensor was connected to. I have a plx devices wideband.
Here is a link to their how to (pdf)
Link
Some other makes have this same feature, read up on the different brands and models (LM1), others...
