XH XR6 ute playing up, help.

[XR6xhute]

Hi all, my XR6 XH ute is playing up and I have no idea what the problem could be. My car at the moment runs like it is not getting enough fuel sometimes, not all the time though. When I drive it, it sometimes runs great and then it will run like a pig and cough and splatter like it isn't getting any fuel or something. I have new leads on the car, spark plugs, there is no fuel blockage anywhere, the fuel pump seems to be ok. I have noticed a slight leak of coolant coming out of the drivers side of the head, only a little mind you. It doesn't seem to be using any water so I don't know if its water leaking into the pots every-now-and again? I can't seem to find anything out of place or wrong. I thought it may have been my injectors but I changed them over with some others that I have and it still does the same thing. It seems to me that it does it more often when the car is not warmed up, when its warmed up it seems to run better but every now and again it will have its moment of running like a big for about 5 secs. I've check my fuel regulator, its seems to be working fine.

I'm out of ideas, someone please suggest something to me. ha ha.

James.