What controls cold start RPMs? I am used to 1600 RPMs cold for a few mins then a drop to 1100, then 600.

I ask because after replacing coils, plugs, air filter,, VVT phasers, chains and tensioners, etc. Cold start RPMs are about lower; 1300 - 1400 then drops to 1100 and finally 600. Performs well when warm

Why am I not getting the 1600 RPMs revs I was used to? Is this all controlled by the computer?

All thoughts welcome!

 

1300 down to 600 is correct. You must had something wrong before. Idle speed is controlled by ecm via throttle plate.

 

Well, what do you know! Thanks. Very reassuring.