Sluggish on start up

[ayeyew]

For the last week or so my AU has decided that sometimes when it starts up it wants to sit on around 200-400rpm and shake pretty bad, lol

Doesn't do it all the time, just every now and then.

Today i went to start it up and it nearly didn't start at all (took about 5 secs to fire up) and then it went with the whole shaking thing

It is an auto and it kinda feels like it is stalling??

Ideas?

All i have been doing to counteract this problem is starting the engine and revving her up to about 1200 for about 30 seconds, then she is fine

She is getting her 140,000km service done on Wednesday so prolly shouldn't worry that much, just wondering what it may be?

I'm thinking either Fuel Pump or injectors or sumn??

Seems to work fine at all other times tho, just not on start up.. Im pretty sure it's firing on all 6 cylinders.. I HOPE