What is this plug for?

[ozegti]

should mention it's an A reg Kjet.

but it still doesn't make sense to me. Anyways, How do i check if the idle valve is working or not?

[Ben Lessani]

Do you mean the 5th injector or ISV?

[ozegti]

either.

I'm trying to cure a high idle (12-1500rpm)

[Jay]

Sorry to hijack, but I've also got a cable unplugged. It's just above the zhaust manifold and maybe to the right  under the scuttle panel (as ya look into the engine bay), pink cable with a plug on it is hanging loose with the other end just above it, now I know it's meant to be plugged in but wtf is it for? My car runs fine with it disconnected...

Please tell me it's the reverse light or sommat  cos mine ain't working and it's not the fuse or bulbs.

Just went out to check again and the cables for the reverse switch on the gearbox look ok, fuse is OK, I changed the bulbs hoping it was them a few months back, but guess it must be the switch that's buggered.

But I'm still wondering wtf this pink cable is, it's only one cable, not two and one spade connector inside the plug... 

[rubjonny]

check for air leaks, pull all the inlet hoses off and look into the folds.  I assume you've tried adjusting the idle screw?

jay: what car do you have!