Rb20 Idlel Issue Please Also Seems To Be Running Very Rich Help

[Bsa]

Hey everyone I have I issue with my rb20 to start with it has stock ecu custom front facing plenum rb25 turbo with bigger compressor wheel and op6 turbine housing welded wastegate highmounted, turbosmart external wastegate 35mm, walbro fuel pump and 32 gtr intercooler with piping to suite now my problem is the car will start and sometimes hold idle and when it does hold idle It hunts really badly revs go from 1000 to 2500 and just keeps doing it and I'm fairly sure it's not the air flow sensor because it will rev over 2500 with no restriction iv replaced the plugs and one of my knock sensors was broken so I got a new one iv cheeked all sensors are connected and iv cheeked for vacume leaks but can't find any I really need help on this one. What could be causing this?

[DVS JEZ]

Idle control valve on the back of the plenum. Well if u still have it?

[Bsa]

Yeah it's still on there iv removed the plenum and put the stock one on to see if it makes any difference I'm hoping it works

[Bsa]

Hey mate I just noticed on your status that you do nistune on the coast and once this problem is fixed I'm looking to get a tune done where abouts are you located on the coast?

[DVS JEZ]

Pm sent

[Bsa]

OK so the car wll now idle propely I'm putting it down to having the idle sensor in the wrong spot but I still have the problem of the car stalling unless I hold the accelarator on so I got the shits and decided to check the ecu codes and it came up saying the tps sensor is dead so I checked all wiring looks good now I'm guessing it has to be the sensor itself. Can the sensor be fixed or should I smash it with a hammer and buy a new one and fit it's a new one how much are they and does anyone have one

[DVS JEZ]

Also try disconnecting the 02sensor. Put some new spark plugs in at the same time and then see