Boost Sensor?
 

Hey guys,

Does anyone know what is in the picture? I can see an unplugged socket, I don’t remember what is it for!
looks like a boost sensor for the gauges or boost controller? Tried to find the other connector but couldn’t see one.

My FD suddenly has boost creep (over boost) when I accelerate the boost goes way above 0.8bar, goes upto 1.38bar as last recorded by the Greddy Profec Electronic Boost controller. Luckily the REDOM ECU has a boost cut/fuel cut.

Is it related?

Any ideas?
https://cimg1.ibsrv.net/gimg/www.rx7...31c6f6a2a.jpeg
https://cimg4.ibsrv.net/gimg/www.rx7...3b9f2900e.jpeg

Most pressure (boost) sensors have 3 pins, so that's a good guess. That doesn't look like any of the OEM Mazda connectors to me, so it most likely goes to an aftermarket sensor. I would follow that section of the wire harness to see where it goes.

Looks like it might be a line for aftermarket boost control using the factory sensor. https://www.raceonly.com.au/product/...ensor-harness/
It's def not OEM

Yeah it's definitely not OEM, I think it's from Greddy, my concerns are why is it unplugged and where is the other plug? I can't find it, is it the reason for the over boost?

It's hard for someone on the internet to guess why something is unplugged on your car. My guess is a person disconnected it and forgot to plug it back in. That type of connector should be pretty secure when it's plugged in.

If your boost controller is not connected to a boost sensor, it will probably not work like normal. Can the boost controller show the boost pressure, so you can check if the controller is measuring boost properly?

Here it is: GReddy

To answer your question: Yes, it shows the boost pressure, but won't do anything when i set it to Low Boost or High Boost parameter setups, although it used to work, but now no. Over Boost all the time.
I am trying to find the other plug...