Hi, I have a 2006 Jazz VTec 1.5 Litre with CVT.

When I do a cold start all is fine.
After a minute or 2 to warm up the idle jumps from around 700 to 1600/1700.
If i tap the accelerator it drops back down to 700, but after about 1-2 seconds it jumps back up again.

My question is.... is there a valve or a choke that I can check or is it something else.

The car drives fine except for the idle problem.

Any help appreciated.

Thanks

 

sounds like your air/fuel mixture is not right. Meaning one of several things. Change your air filter, or valve adjustment needed or new spark plugs, or new primary O2 sensor.

My car is boosted and cold start it jumps around like that, but once it warms up its fine.