....... Ok. ? No offence but do you know what you are talking about?

Please explaine what "control that changes the fuel mixture when cold" you are talking about?

Are you talking about the IACV? it is fine, my idle is fine...

The engine is missing.

Normal motor - daaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

Mine - daaaaaaaaaaaaaaaaaaadaaaaaaaaaaaaaaaaaaaaaaaaaadaa daaaaa

And when it misses, it only drops 100rpm at the max. I would say 20-100 RPM.

Can a bad injector cause this?