yer my understanding is that the "cold start" is that extra injector that is sorta stuck in the side of the manifold.
there is a temp switch in the back of the head (its brown plug i think) that is in the circuit for that injector, and then when the temperature has warmed up enough the extra injector stops firing.
so the extra injector may be present for the first few minuites of engine runnning, which i think is possible since my engine smells uber rich for the first few minuits of running. then it comes good.
all that water lines crap around your maniflold is the idle up for when its cold (note: different to the cold start). on my engine i just blocked off everything i could, and set the idle using the idle screw and the screw that stops the throttle from closing all the way, as others have stated.
also i belive that the water lines are there to actually warm up the intake manifold/throttle body. apparently in REALLY cold climates (ie sub zero) they have problems with intake temperatures being so low that the air is so cold it just wont mix well with the fuel, (atomisation?) so they need to warm up the intake to help it. apparently also the throttle body can freeze from "wind chill" from the incoming air. i dare say that would never be a problem in australia.
only problem with this is that there is no idle up when its cold, like every other engine has. which is only really a problem on really really cold mornings when it will tend to stall quite easily. my remedy for this is just letting it idle for a bit before i start driving. i usually go and start my car, then lock up the house etc. give it a few minuites to warm up.
so i woudl check that brown plug on the back of your head, and also make sure the inejctor plug is on as well.
having said that you can drive it bone cold, you just have be mindfull that its gonna run rich, and gonna stall easily. but thats only a problem if you are stop/starting. cruising is fine.
to the OP: if you are saying that you need to keep the engine going manually when its cold, i say something is up with your engine, maybe the idle is set way to low, or the cold start injector isnt working how it should.
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