need more help.............

[T-Punk]

i have no idea how you didnt get a code by hollowing your cat, when i hollowed mine the code came on about an hour after driving it... you do know that when you trip a code all that happens is the service engine soon light comes on right? anyway just get rid of the sensors altogether or leave them in the headers, no big deal either way.

[phoenix64]

The third o2 is not an issue, I have had a sim in its place for a long time.

Thanks for the opinions, but they are going in the down pipe along with the wideband.

One more question, does anybody know which wires to splice to get the reading from one sensor to read to both sides?

[1DangerousV6]

beats me man...they probably dont work anyway lol

[Mogobs30th]

Originally posted by phoenix64:
I need to know if the o2 sensors can be put in the downpipe after the turbo. Or do they have to go in the headers. I want to avoid exposing them to the heat and pressure of the headers.

Thats basically the point of the O2 sensors, they basic function is to measure heat within the length of the exhaust. Placing them farther away from the block will only give the computer in inaccurate reading, sending more or less fuel to the engine. I would place them in the headers, like everyone suggests.

[TurboProject]

Hey viper, you said you were going to add a wideband with an output to the PCM? Correct me if I'm wrong but I'm pretty sure the stock PCM can't handle a ~5v signal that widebands put out. It's a lot different than what the computer expects from a narrow band since a wide band can tell you exactly what the a/f ratio is and a narrow band really only knows stoich, lean, and rich, and not really anything inbetween.

Also, what wideband setup are you going with? I'm wanting to use one with my megasquirt setup so I can actually tune it better.

[Turbo V6 Camaro]

Originally posted by TurboProject:
Hey viper, you said you were going to add a wideband with an output to the PCM? Correct me if I'm wrong but I'm pretty sure the stock PCM can't handle a ~5v signal that widebands put out. It's a lot different than what the computer expects from a narrow band since a wide band can tell you exactly what the a/f ratio is and a narrow band really only knows stoich, lean, and rich, and not really anything inbetween.

Also, what wideband setup are you going with? I'm wanting to use one with my megasquirt setup so I can actually tune it better.

it puts out both one for the pcm and one for the wideband
http://www.zeitronix.com/Products/zt2/zt2.htm

[phoenix64]

Can anyone here name a factory turbo setup with the o2 sensors before the turbocharger?

I would rather have the sensors 4" further down stream, and not have them exposed to the extreem heat of TWICE what they were designed for. If I'm wrong, I'm wrong no big deal, I'll find out soon enough.

So if you guys could answer my question about the o2 wiring that would be great.

[TurboProject]

Here's an idea phoenix: you could install an extra set of bungs further down and also have ones in the stock location. That way you can install the O2 sensors in one set of bungs and then plug the other set. You'd probably like that better cuz then you could experiment around with the different locations and it wouldn't cost much more and you could go ahead and get the headers coated. They probably would work fine in the stock location but I always like a bit of flexibility too.

Viper, I saw that the thing has a wideband output but I'm still pretty sure a stock ECU won't know what to do with a wide band signal. Or are you not using a stock ECU?

[Turbo V6 Camaro]

Originally posted by TurboProject:
Here's an idea phoenix: you could install an extra set of bungs further down and also have ones in the stock location. That way you can install the O2 sensors in one set of bungs and then plug the other set. You'd probably like that better cuz then you could experiment around with the different locations and it wouldn't cost much more and you could go ahead and get the headers coated. They probably would work fine in the stock location but I always like a bit of flexibility too.

Viper, I saw that the thing has a wideband output but I'm still pretty sure a stock ECU won't know what to do with a wide band signal. Or are you not using a stock ECU?

read the fetures it has a output for the pcm too ;) \Bosch Wideband O2 sensor
Analog Wideband Output (for your favorite Standalone Engine Management System)
Serial data output to the Zeitronix Wideband LCD Display
Serial data output for real time datalogging (PC laptop required)
RPM Input ( tachometer or primary side ignition coil input).
The RPM input works on any car and any ignition system. No additional adapters needed!
Simulated Narrowband Output to feed stock ECU
Throttle Position Input
Boost Sensor Input
EGT Probe Input
User Input

[TurboProject]

ah ha! Well there you go. Let me know how it works out for you. Looks like a good deal for a wide band setup.