two questions

[pastr]

Hello
I have two questions:
1. When I start the aircon the rev, at idle, are going down a bit
and there is no rev compensation.
There is a new stepper motor.
What other component compensate the rev drop down?
2. see the attached pic.
I have a problem, the rev oscillate up & down a little bit.
When I'm pulling the no' 3 pipe the rev go up a little bit and the
oscillation is almost undetected. If I'll put the pipe back, the rev will drop
down and the oscillation will be stronger. What I should understand from
this and what to do?

[pastr]

when i start the air condition the rev go down (at idle) and there is no rev correction, what can be the reason?

[Blknight.aus]

there doesnt need to be an increase in Revs if the revs stay the same your good.

if the revs drop off and dont recover then you have a problem with the IAC side of business

if it hunts you may also be getting some advance walk for the timing,