ok as some are arware i have the 2.8, in an 87 rx7. tourqy as i want it, really fun to drive, but then my cat got cloggeg, and i had to replace tit with straight pipe, but the car still felt sluggish, i was looking at all the wiring and i found a wire that was ran into the fender, i pulled it out and there was an o2 connector, with then dang o2 sensor in it? There is one o2 hooked up, but are there supossed to be two? or is this the results of ******* wiring? someone please help me with this one..... please

 

There should be one connected in the exhaust and one connected on the intake side of the engine

 

does anyone have a pic of this one thats supposed to be on the intake side? i have one in the exhaust and would like to know where this other one is located...so if i dont have it, i can replace it and help fix problems. thanks

 

we need a pic of it and where it is at from you and will get better answers. i cant tell much from your description but it dont sound familiar to me. my car only has 2 things in the intake the MAF and the IAT in the aircleaner. i have only 1 thing in my exhaust and that is the O2.

 

Ok...
O2 senor will ONLY be on/in exhaust. You will never find one in the intake. I mean what is it gonna tell you? oh there is lots of O2 here.
Now RWD 2.8/3.1 had only one.
Some 3.4's have 2, one on each exhaust bank.
The factory design of the RX I believed used 2.

What sensors you will/may find on the intake side (not limiting to 3rd gens) MAF, IAT, BARO, Vacuum, MAP.

 

^^^ ok thats what i thought. i figured it was going to be something left over from the rx7 wiring. i know that the o2 would be in the exhaust... but whenever it was said that there was one in the intake........ thats why i asked for a picture.. thanks.