Question about PROBES (Egt/O2)
 

My car came with a wideband 02 sensor, and has some funny numbers while idleing.. ill try to pull some logs to get an exact output. But my question is, my car came with dual pre-turbo exhaust gas temperature (EGT) probes. Is it common for these to throw the check engine light? It was known to be needed to be replaced, would it throw out funny numbers on the digital display? And any brands/sources/people to deal with for getting them that you guys recommend? Thanks!

And you car is....what? Always post vehicle info. Otherwise your threads will probably be overlooked.

I can tell you right now that no RX-7 has factory EGT sensors or widebands, so your check engine light problem is unrelated. If you post vehicle info, I can direct you to check checking information.

Haha oops lol, its an fd. I meant to ask is it common for the O2 sensor to trigger the check engine light in these cars more than others? I read that somewhere a long time ago but im not sure where. It doesnt let me search threads with just two characters making searching difficult.

Check Engine Light Codes

If you haven't already, pull codes to see what's setting the CEL off. A narrowband sensor is virtually the same in any car, and it's a cheap part to replace.

If you have a wideband gauge/sensor, that will likely be separate from your stock narrowband. The exception is some wideband controllers have a narrowband output wire that can be connected instead of the original sensor. If that's the case, then you would replace the wideband sensor if it is no longer working.

What wideband is it, and what numbers are you seeing? If emissions are removed, you should see approx. 12-13 AFR at idle.

Ill be pulling codes today or tomorrow as the car was getting a safety while I was out of town visiting MN. I dug a little deeper and came across the same findings, the car came with an Innovate Motorsports LC-1 with the 16 bit display. I took the simple approach and I found the manual for it online. If the check engine code comes up as a O2 sensor, ill replace it, and if the check engine light is all cleared up.. Ill recalibrate the wide band sensor following the manuals directions and see if there are any changes. The car was idling 12-13 or so, but being street ported and running on an unknown pfc map, it may be running lean. I drove it real lightly to get it the shop for a safety, and saw anywhere from 10.5 to 14 as I let off, cruising in high 12's, and it varying going up and down hills, letting off etc. Thanks for the help so far.

The LC-1 has a simulated narrowband output, so there would be the possibility of just one O2 sensor on the car. It depends on how it was installed.

Does this car come with an aftermarket ECU..like a PFC?

Yeah, PFC + Commander + Logit, just waiting to get my car back so I can actually see whats going on under the hood.. I posted this when it went for a safety a few days ago, but my mechanics been in emerg with a family member .. Giving me lots of time to over think this.

Double post - w00t. Still no car to check it out ... I completely forgot I can use the pfc to check the sensors. Thanks.