sorry to be dumb, but how do i wire up the ecu light?

is it just a 12v lamp i need?
am i right in thinking i use pin 6 on the green plug that on the ecu loom coming through into the car? the brown and blue cable??

do i connect the live side of the lamp onto that and the other side just down to earth?

when does it flash up the fault codes?
when running or just when the ignitions on?

is there anything i can do to bypass the fuel tank vent valve?
like i said in the pm mate, one of the inlets into the valve was broken (the one that the pipe from the inlet manifold goes to)
the other side of the valave has a pipe the runs across the fuel rail to the drivers side and then just to atmosphere.

would it make any difference if i unplugged that vavle?

thinking about it now it could well be this thats the problem as that had broken. and could of just been knocked when doing the water pipes or something. but nothing else has been touched.

are the expensive to buy, as if they are not i'll try and get one asap and see if it fixes it.


chip:
i did try adjusting the throttle cable to keep it running, but it dosnt keep it running untill about 3k or so.

i dont have any sort of equipment that i could check fuel pressure or anything with.

cheers for the advice.

do you know if any of the parts that have been mentioned are cheap?

i dont mind spending money on it, but dont want to if they are really expensive and might be the wrong bits.
but if they are cheap i'll just get them incase as it cant hurt to replace bits can it.