Kalos 2006 1.2 8v, high rpm at cold start at morning

[ncsabi18]

Hello. I have a Kalos hatchback with 1.2 8v engine (B12S1). Every cold start is with high rpm (2700-3000), but only under 10*C. It`s idle high a couple of seconds, and then dies if i not help it with the acceleration a little. No errors find on tester, checked temp senzor, map senzor, vacuum, crank senzor , but no problems i beleave. if car sits 2-3 days, but the weather is over 10*C it starts normal. The car drives good, no other simptoms. Somewhere i read that maybe it needs a software update for Ecu, but there are no Chevy services nearbye to me. Any ideas what to check? Thank You

[Daox]

I am not familiar with the 1.2L engine. However, I would try to clean the idle air control valve. This valve controls idle speed and they can get sticky and not work properly over time.

[gclark8]

If could also be the fuel. Are you using the best quality and highest octane rating available?
See my Garage page for details.

Edit, after further thought: This reminds me of the old days of carbys and auto chokes in VWs, try a short sharp kick to the accelerator pedal.

[ncsabi18]

I am using normal 95 petrol. This engine has the MTIA electronic system, no separate idle control valve.

[Daox]

If its electronically controlled and there is no valve to stick, then I would say its normal. All engines are programmed to idle fast when its cold out. This warms them up quickly.

[ncsabi18]

tomorrow i will make a video on cold start, i don`t think that it is normal. I had a couple of cars, petrol and diesel, but non of them has this simptoms.