lamda nut

[mikeyredtop]

ive relocated my lamda sensor to the mid section just after the flange, because my 4branch was off a 1.4sr not sri, so it didnt have screw thread for it... i used a nut for the mid section which was the wrong size but it worked, just, with paste to prevent blowing. i wanna put it on the 4branch now cause the ecu light comes on sometimes with the fault code for the lamda sensor. but i wanna use the correct size thread, done properly. does any know what size nut to use? :help:
i wanna do this before i put the c16se engine in as i want it to run right..

[Ste_Nova]

having it in the wrong place will not bring the ecu light on

[mikeyredtop]

well it does, it never used to come on when it was on original exhaust, think code reading is "low voltage output" or somthing.. not open circuit which would suggest fucked lamda..