Vae,Min and high rpm problems

Hi at all. I've a strange problem.
A days ago I change lambda sensor.Finally my baby goes without a unstable idle.

After a couple of days,I discovery a problem.
If I push the accelerator pedal,over 3500/4000rpm and push down the clutch,rpms stay high for some seconds,and turn back slowly.

Same on movement and on neutral.

I unmount and deep clean idle valve.But unfortunately no solution.

So,I try to tune the min bypassing idle valve,acting on throttle valve screw.All this to exclude a problem with throttle valve.
Infact, without a idle valve,my car haven't the problem described.

If I reconnect the idle valve reappear the problem.
I've also try to tune the precharge big black screw on the idle valve,but I can't find a set-up that allow a stable min and don't give the problem on high rpms.

I've check the idle by give a variable voltage,and it work.

I don't know what can I do

If can be useful,I can post a video of the problem

I solved. I find a just regulation between vae and throttle

Hi Zonalimitatore,

I think that I may have the same, or similar problem.

Could you describe what you did to solve this? I'm not sure what you mean by 'I find a just regulation between vae and throttle'.

Thanks!

Hello.
I try to explain what I do.
First at all deep clean of vae.
But when I mount it the same problem (I do the same turn when I unmount. 4 turn 1/2)

So I've keep engine on and wait for first fan.
Unplug the vae and engine incoming to not maintain the min.
So adjust it with a screw on throttle valve and find to keep 900rpms without vae.
Try various time by accelerating. (Obviously when try the rpm drop cause there isn't vae)
I do this various time for be sure.Attention,not try when there is a fan on,or light,ecc...)Only engine on,and at temperature.When fan start,rpm drop.So wait until turn off.

Well.when the baby have a stable rpms without vae,turn the engine off. Replug the vae,and turn on.

Now the error disappear.Try to turn on and whatch what's up.

If give a high rpms,keep engine on,and adjust the big black screw on back of vae.Rpms slowly drop down,and you have to find the right tune from high rpms and a shaky min.
When the min it's stable,try to do some acceleration and release.
If on release,rpms drop down again,and after stay stable,turn the vae's screw,until the problem disappear.

When u accelerate and release, the rpms have to stay stable,without drop down and turn ok.
Try different times with the car in motion.

Hope to have explain,but in English it's a little hard!

Thank you Zonalimitatore!
Could you confirm what the vae is please? Sorry! I think you mean the Idle Control Valve, is that correct?
Also, is your car a 20VT?

Yep sorry vae=the Idle Control Valve
My it's 1.8,but the idler system it's the same