70,000 km / 45,000 miles on the clock, service up-to-date. Daily driver and a great ride.

Starting few weeks ago, car would occasionally (about once or twice a week), have difficulty with cold starts:

- engine would not catch on 1st crank, then start up as normal on 2nd crank;

- engine would catch on 1st crank, but stumble then surge for a sec. The surge takes the rpm to about 1,500 mark (normally should be around 1,000 ?), before settling down to the usual idle speed.

No Check Engine Light at all, and the car otherwise runs fine.

Warm/hot starts are always good, one crank.

What may be the problem ?

Throttle Actuator (big $$$) starting to go bad ? Or something minor to leave alone for now, taking it to the shop if it gets more frequent ?

Thanking in advance.