Ive never done this before but know ive seen instructions somewhere, ive searched but cant find a link to instructions, probably im just being thick but ive tried, does anyone know where to find this???

Try the FANTASTIC...........

 

http://www.300zx.org.uk/

got it thanks

im getting code 33??? exhaust gas sensor (left) would this put me on safety boost? is it because im de catted? help please

Had to move the car started it up pulled off drive then back on and tried ecu check again only to find code 55 all clear?? im baffled ??? why would it do that???

I'm no expert bit I believe to carry out the o2 sensor test properly, the engine has to reach operating temp......maybe yours hadn't? Check again on 300zx.org for specific test for o2 sensor? BTW I'm pretty sure that wouldn't put you in SB either.....more than likely a hose come off.....listen carefully for a "hissing" under the bonnet.

 

HTH.