boeing727

I'm in the process of installing my Hooker headers on my '98 T/A. Here are my questions:

1) Is one pair of O2 simms all that I need? If so, where do they plug into? The pre cat O2 sensor harness, or the after cat O2 harness.

2) In the bong on the headers, what did you put there? Do you use an O2 sensor to fill the hole on each pipe?

Your help is appreciated...Thanks

Mike

11 Bravo

iTrader: (3)

The O2 simms plug into the rear sensor holes on the Y pipe. The simms take the place of the converters. Your Hookers should have came with O2 extensions. Use those to plug the front sensors into the headers.

11 Bravo

iTrader: (3)

Yes, your original front O2 sensors go into the headers. The simms are for the rear O2 sensors, because you will no longer have converters. I haven't put my Hookers in yet, but I'm pretty sure (could be wrong) the extensions are for the front sensors. You may need to buy extensions for the simms, depending on where you are having the holes on the custom Y made for the simms.

11 Bravo

iTrader: (3)

As a matter of fact, I just read the instructions that came with my Hookers. The extensions are for the front sensors, the ones that go into the headers.

Freak

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 11 Bravo:
<strong> depending on where you are having the holes on the custom Y made for the simms.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">sims dont go into the Y pipe, they jsut plug into the harness and lay there, of course zip tying them is a good idea. no holes neccesary

11 Bravo

iTrader: (3)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Freak:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 11 Bravo:
<strong> depending on where you are having the holes on the custom Y made for the simms.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">sims dont go into the Y pipe, they jsut plug into the harness and lay there, of course zip tying them is a good idea. no holes neccesary</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Cool, thanks. I never knew that.

Fulton 1

iTrader: (9)

Like Freak said, the front O2 sensors are reused and installed in the Hooker collectors with the help of some O2 extensions most likely. The rear O2 bungs in the Y-pipe (assuming there are some) will need to be plugged (they should be 18mm) either with the O2 sensor itself or a bung plug. The O2 sims will plug into the wire harness in place of the rear O2 sensors you were using before.
The rear O2's basically just monitor the catalytic convertors while the fronts are used to adjust your fuel mixture. If the rear O2 and front O2 sensors show the same readings then the PCM assumes that either the cat is missing or defective and it'll set a code. The O2 sim just tricks the PCM into thinking that the catalytic convertors are present and functioning great <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> They don't need to provide any actual readings only something that fluctuates signal properly - the fronts on the other hand are necessary. By using sims you are really approximating an OBD-I setup in a way.

Tin Indian

Fulton is right. The extentions are provided so you will have a little more wire to hook up your front O2 sensors in the collector bungs of your new headers.

If you dont use a set of rear 2 sensors becouse you have deleted the cats, or there are no bungs in the Y-Pipe, just plug the Simms into the wire connectors that would normally attach to the rear O2 sensors. You certainly dont need extentions for these. Then zip tie the rear O2 sensor wires/O2 Simms out of the way.

Ron,

boeing727

In other words...I use the original front O2 sensors in the headers, and use the simms, with the extensions, in the rear sensor wiring harness of the car???? Is this correct? I will be having an ORY pipe custom made for this install.

Thanks

boeing727

I understand it now, guys. Thanks to everyone replying.

Mike <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />