Blue Plug Under Intake Manifold

[SDEWY5]

Hi guys, i got a bit of a problem. Ive got one extra plug, blue in colour that comes out of what looks like about 10cm away from the starter motor in the wiring loom that goes into the starter motor and i have no idea where it goes! i cant find anywhere to put it and it looks kinda important, the cars been apart for a while so im afraid when i try to start it tomorrow when its altogether again that it wont start...it'll be pretty dissapointing because i really want to drive it tomorrow! hasn't turned over in 3 months!

[Sumo]

Sounds like either an oil pressure sensor plug or a knock sensor plug. I'm not sure which side these are on on a skyline. But it would nearly have to be the starter motor side.

Cheers

Sumo

[Duncan]

yeah they are both on the intake side.

but really we need a pic to have a chance of guessing

[blind_elk]

Could be for the Cold Start Air valve - hangs under the inlet plenum on a RB25.

[SDEWY5]

yep well, cars all together and there is no power going to the starter motor...ill try and get pics but its just not turning over...