car - 2.2 direct elite

had it now for a couple of months and what I'm about to describe has happened only twice, so its not major.

when I go to the car, turn the engine on and it fires up but is really lumpy. turn the car off and it starts fine.

the tick off is about 700rpm and I'm currently using IK20 iridium plugs.

just fitted a new K and N but the first time I was using a std filter.

the first time the car was on a flat, the second was on a slope.

temp the first time was about 25 deg C, the second was 15 deg C.

or, am I just worried over nothing?