Mazda Rotary Club

General => General Technical => Anything Engine/Performance/Tuning related => Topic started by: gavinnblake on June 11, 2012, 06:56:52 PM

Title: need help on exhaust Sensor
Post by: gavinnblake on June 11, 2012, 06:56:52 PM
hi all
 
just got a new exhaust for my
1996 Mazda RX7 Type R Single Turbo T88 34D Rotary Engine 13B
 
this new exhaust is a STAINLESS STEEL DE CAT BACK EXHAUST SYSTEM + DOWNPIPE
 
has no were to put a sensor on do i need to have the sensor on the exhaust :3Confused
 
(http://i238.photobucket.com/albums/ff309/gavinnblake/IMG_0062.jpg)
Title: need help on exhaust Sensor
Post by: m1tch on June 11, 2012, 07:03:34 PM
Hi there,

Firstly, I am guessing the engine is mapped for a decat? I believe the sensor you are pointing at is the O2 sensor which is used by the stock ECU and will probably throw a code if missing, unless its a cat heat warning sensor which might also throw a code if missing. Sorry for not being specific, I have an FC rather than an FC, we just have a single O2 sensor used only in a specific part of the ECU map.
Title: need help on exhaust Sensor
Post by: gavinnblake on June 11, 2012, 07:14:39 PM
yes been mapped for a decat
 
i think is a O2 sensor
Title: need help on exhaust Sensor
Post by: m1tch on June 11, 2012, 07:23:23 PM
Im sure someone with an FD will be along in a bit then, not sure how much the FD uses the O2 sensor, they are usually mounted higher up on the downpipe rather than under the car (mine is) I would also look at investing in a wideband O2 sensor to keep an eye on the AFRs if you are getting into tuning it up a bit :)
Title: need help on exhaust Sensor
Post by: wolfie1 on June 11, 2012, 08:01:57 PM
that is the 02 sensor, you dont need that but under 1 of the seats there is a plug you need to do something with to put the heat light out on the dash, mine is running on twins and i have another wire on the front pipe which is needed
Title: need help on exhaust Sensor
Post by: philiwily on June 11, 2012, 08:25:09 PM
How many wires are on the plug as it looks like a wideband sensor, if it\'s just one wire it will be the standard narrow band, disconnect then use your commander, go into ETC and switch off O2 sensor. It will drive no different.
Do you have a wideband gauge?
The wires Wolfie is talking about is the heat light switch but they would have been joined already for your last pipe.
Title: need help on exhaust Sensor
Post by: gavinnblake on June 11, 2012, 10:41:13 PM
yes i have a wideband gauge
Title: need help on exhaust Sensor
Post by: philiwily on June 12, 2012, 02:08:55 AM
Then that\'s your wideband sensor, you will need to buy a boss and get it fitted to your new pipe.
Of the top of my head I think it\'s M18x1.5 but you can buy them on eBay.
Title: need help on exhaust Sensor
Post by: gavinnblake on June 13, 2012, 01:35:35 PM
thanks alot for all you help